Formulas, as the name indicates are calculations that you could define in SkyDesk Reports to help you create the required reports. SkyDesk Reports provides a powerful formula engine to create any type of calculations required, to enable creating the required reports. Formulas are mathematical expressions that you create, which contains any combination of numbers, references of table columns, operators and functions etc. Functions are predefined mathematical formulas which are designed to perform specific well-known calculations.
SkyDesk Reports supports different flavors of formulas. The following is a summary of the various types of formulas that are supported in SkyDesk Reports:
SkyDesk Reports allows you to define your own powerful formulas to meet your specific reporting requirements. This enables you to easily perform from simple calculations such as addition and subtraction to a complex combination of in-built functions. As the output of the formula adds a new column in the table is called a Formula Column . You can use these formula columns in creating reports in the same way you use other columns in a table.
SkyDesk Reports provides you with a variety of in-built functions which are predefined mathematical formulas which are designed to perform specific well-known calculations easily. These in-built functions can be used in combination with the table columns and basic arithmetic operators like +, -, / and * to create your formula column.
To create and use Formula Columns:
For example, to build a Formula Column that adds particular number of days to a given date:
To create a formula column with this expression, type column name in the Formula Column Name text box and then click OK . A new formula column will be created in your table as shown below.
You can edit the formula column any time by right clicking on the formula column listed in the table and clicking Edit Formula Column in the popup menu. Also refer to View/Edit Formulas to know how you could view all the formulas defined on a table and handle edition or deletion of the same.
SkyDesk Reports provides an easy and convenient way to add formula columns which are based on a limited set of widely used functions. You can find this quick add option as follow.
SkyDesk Reports provides you with a variety of in-built functions which are predefined mathematical formulas designed to perform specific well-known calculations easily. The following table gives a list of inbuilt functions provided by SkyDesk Reports which can be used to create any formula. The inbuilt formulas are categorized/grouped based on type of function.
Date Functions |
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FUNCTION | DESCRIPTION | EXAMPLE |
Absolute Month - absmonth(date_column) | This function will return month and year from a given date value with the format (Month, yyyy). | absmonth('2011/8/7') = August, 2011 |
Absolute Quarter - absquarter(date_column) | This function will return Quarter and year from a given date value with the format (Quarter, yyyy). | absquarter('2011/8/7') = Q3, 2011 |
Add Date - adddate(date_column, num_of_days) |
This function will add the specified number of days(num_of_days) to the given date value. | adddate('2011/8/7',10) = 2011/8/17 |
Add Time - addtime(data_column, time) | Returns the day by adding the time to the given date column. | addtime ('2002/02/21 18:23:26', '01:20:10') = 2002/02/21 19:43:36 |
Current Date - currentdate() | This function will return the current date of the computer or server. | currentdate() = 15 Sep, 2011 10:06:18 |
Date and Time Dif - dateand timediff(Unit, From Date, To Date[optional] |
This function will return the date and time difference between two date columns based on the units specified. The supported units are SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, YEAR. | dateandtimediff(DAY, '2015-01-01', '2015-05-01')=120 The above example returns the difference between the given dates in Days. |
Date Diff - datediff(date_column1, date_column2) | This function will returns the difference between the two given date columns. | datediff('2011/8/11','2010/9/11') = 334 |
Day - day(date_column) | This function will return the day of the given date value. | day( '2011/9/9') = 9 |
Day of Week - dayofweek(date_column) | This function will return the number of the day of week of the given date value (Sunday = 1, Monday = 2,...). | dayofweek('2011/9/9') = 6 |
Day of Year - dayofyear(date_column) | This function will return the number of the day of the year of the given date value (0 through 365). | dayofyear('2011/9/2') = 245 |
From Unixtime - fromunixtime(seconds) | This function returns the unix time for the given seconds value. | fromunixtime('1000') = 1970/01/01 05:46:40 |
Hour - hour(date_column) | This function returns the hour of the given date value. | hour('2011/8/7 10:35:23') = 10 |
Last Day - lastday(date_column) | This function will return the last day of the month for the given date value. | lastday('2011/9/7') = 2011/9/30 |
Make Date - makedate(year,num_of_days) | This function returns the date value for the given year and number of the day value (0 through 365) | makedate('2011','23') = 2011/1/23 |
Minute - minute(date_column) | This function returns the minutes of the given date value. | minute('2011/8/7 10:35:23') = 35 |
Modified Time -modifiedtime() | This function returns the created time of the record (if the record is newly added) or the last modified time of the record. When you apply this function, initially it will return the time at which the formula has been created. Subsequently it will return only the modified time of the record. | |
Month - month(date_column) | This function returns the name of the month of the given date value. | month('2011/9/7') = September |
Month Num - monthnum(date_column) | This function returns the number of the month of the given date value. | monthnum('2011/9/7') = 9 |
Quarter - quarter(date_column) | This function returns the quarter of the given date value. | quarter('2011/8/7') = Q3 |
Second - second(date_column) | This function returns the seconds of the given date/time value. | second('2011/9/7 10:35:23') = 23 |
Sub Date - subdate(date_column,num_of_days) | This function returns the date by subtracting the number of days(num_of_days) from the given date value. | subdate('2011/9/15','6') = 1990/9/9 |
Sub Time - subtime(date_column,time) | This function returns the date by subtracting the time from the given date with time value. | subtime('2011/02/21 18:23:26','01:20:10') = 2011/02/21 17:03:16 |
Week Day - weekday(date_column) | This function returns weekday name (Sunday, Monday...) of the given date value. | weekday('2011/9/14') = Wednesday |
Year - year(date_column) | This function returns year from the given date value. | year('2011/9/7') = 2011 |
Numeric Functions |
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FUNCTION | DESCRIPTION | EXAMPLE |
Abs - abs(numeric_column) | This function returns the absolute value (number without sign) of the 'numeric_column' | pi() = 3.14159265358979 |
Acos - acos(numeric_column) | This function returns the arc cosine value of the specified 'numeric_column'. Returns NULL if the 'numeric_column' is not in the range-1 to 1. | pow(2,3) = 8 |
Asin - asin(numeric_column) | This function returns the arc sine value of the specified 'numeric_column'. Returns NULL if the 'numeric_column' is not in the range-1 to 1. | rand() = 0.282164005825449 |
Atan - atan(numeric_column) | This function returns the arc tangent value of the specified 'numeric_column'. | atan(2) = 1.107149 |
Atan2 - atan2(numeric_column1, numeric_column2) | This function returns the arc tangent of the specified columns 'numeric_column1' / 'numeric_column2 | atan2(0.8, 0.6) = 0.927295 |
Ceil - ceil(numeric_column) | This functions rounds the 'numeric_column' to the nearest integer which is greater than the 'numeric_column' | ceil(11.56) = 12 |
Cos - cos(numeric_column) | This function returns the cosine value of the specified 'numeric_column' | cos(0) = 1 |
Cot - cot(numeric_column) | This function returns the cotangent value of the specified 'numeric_column' | cot(0.25) = 3.916317 |
Degrees - degrees(numeric_column) | This function returns the angle in Degrees equivalent to the given Radians | degrees(1) = 57.2957795 |
Exp - exp(numeric_column) | This function returns the exponential value of the 'numeric_column' | exp(2) = 7.389056 |
Floor - floor(numeric_column) | Rounds the 'numeric_column' to the nearest integer which is less than the 'numeric_column' | floor(11.56) = 11 |
Greatest - greatest(numeric_column,..., numeric_column) | Gives the greatest of the given arguments. | greatest(10,20,5) = 20 |
Least - least(numeric_column,..., numeric_column) | Gives the least of the given arguments. | log10(3) = 0.477121 |
Ln - ln(numeric_column) | This function returns the natural logarithm of the specified 'numeric_column' | ln(5) = 1.609438 |
Log10 - log10(numeric_column) | This function returns the logarithm to the base-10 of the specified 'numeric_column' | log10(3) = 0.477121 |
Log2 - log2(numeric_column) | This function returns the logarithm to the base-2 of the 'numeric_column | log2(32) = 5 |
Mod - mod(numeric_column1, numeric_column2) | Returns the remainder of the 'numeric_column1' divided by 'numeric_column2' | mod(10,3) = 1 |
Pi - pi() | This function returns the numeric value of the pi. | pi() = 3.14159265358979 |
Power - pow(numeric_column1, numeric_column2) | This function returns the value of 'numeric_column1' raised to the power of 'numeric_column2' | pow(2,3) = 8 |
Random - rand() | Returns a random value between 0 and 1. | rand() = 0.9233482386203 |
Radians - radians(numeric_column) | Returns the angle in radians equivalent to the given degrees | radians(180) = 3.1415926 |
Round - round(numeric_column) | Returns the rounded integer value of the 'numeric_column'. | round(10.67) = 11 |
Sign - sign(numeric_column) | Returns-1, 0, or 1, if the 'numeric_column' is negative, zero, or positive. | sign(-23) =-1 |
Sin - sin(numeric_column) | Returns the sine value of the 'numeric_column'. | sin(0) = 0 |
Square - square(numeric_column) | Returns the square of the specified 'numeric_column'. | square(10) = 100 |
Square Root - sqrt(numeric_column) | Returns the square root of the specified 'numeric_column'. | sqrt(16) = 4 |
Tan - tan(numeric_column) | Returns the tangent value of the specified 'numeric_column'. | tan(0.5) = 0.546302 |
String Functions |
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FUNCTION | DESCRIPTION | EXAMPLE |
Concat - concat(string_column,...,string_column) | Returns the concatenated string of the given arguments. If any one of the argument is null, it returns null. | concat('abcd','ef','db') = abcdefdbd |
Concat_WS - concat_ws(separator,string_column1 ,....,string_columnN) |
Returns the concatenated string of the given arguments separated by the given separator. If the separator is null, it returns null. | concat_ws('-','abcd','ef','db') = abcd-ef-db |
Insert - insert(string_column, start_pos, len, new_string) | Returns the string 'string_column', with the substring beginning at position 'start_pos' and 'len' characters long replaced by the string 'new_string'. 'start_pos' should be greater than 0. When len is zero, the 'new_string' is inserted previous to the position 'start_pos'. | insert('abcddb', 3, 2, 'efgh') = abefghdb |
Index of - indexof(string_column, sub_string) | Returns the index of the first occurrence of the string 'sub_string' in string 'string_column'. | indexof('abcddb','db') = 5 |
Left - left(string_column, len) | Returns the 'len' number of characters from the left-hand side of the string 'string_column'. | left('abcdef',3) = abc |
Length - length(string_column) | Returns the character length of the string. | length('abcddb') = 6 |
Lowercase - lowercase(string_column) | Returns the string 'string_column' with all characters changed to lowercase. | lowercase('AbCD') = abcd |
Locate - locate(sub_string, string_column, start_pos)c | Returns the index of the first occurrence of the string 'sub_string' in string 'string_column' starting at the position 'start_pos'. | locate('db','skydeskdb',6) = 8 |
Lpad - lpad(string_column, len, pad_string) | Returns the string 'string_column', left-padded to a length of 'len' characters with the string 'pad_string'. If length of the string 'string_column' is greater than 'len', then the first 'len' characters of 'string_column' is returned. | lpad('DB',5,'a') = aaaDB |
Ltrim - ltrim(string_column) | Returns the string 'string_column' with leading spaces removed. | ltrim(' abcd') = abcd |
Repeat - repeat(string_column,count) | repeat('Abcd',3) = 'AbcdAbcdAbcd' | |
Replace - replace(string_column, from_string, to_string) | Returns the string with all occurrences of the string 'from_str' replaced by the string 'to_str' | replace('abcdac','ac','db') = abcddb |
Reverse - reverse(string_column) | Returns the reverse string of 'string_column'. | reverse('abcd') = dcba |
Right - right(string_column, len) | Returns the 'len' number of characters from the right-hand side of the string 'string_column' | right('abcdef',4) = cdef |
Rpad - rpad(string_column, len, pad_string) | Returns the string 'string_column', right-padded to a length of 'len' characters with the string 'pad_string'. If length of the string 'string_column' is greater than 'len', then the first 'len' characters of 'string_column' is returned | rpad('DB',5,'a') = DBaaa |
Rtrim - rtrim(string_column) | Returns the string 'string_column' with trailing spaces removed. | rtrim('abcd ') = abcd |
Strcmp - strcmp(string_column1, string_column2) | Returns-1 if the 'string_column1' is smaller than the 'string_column2', 0 if the two strings are same, and 1 if the 'string_column1' is greater than the 'string_column2'. | strcmp('abcd', 'abcde') =-1 |
Substring - substring(string_column, start_pos, string_len) | Returns-1 if the 'string_column1' is smaller than the 'string_column2', 0 if the two strings are same, and 1 if the 'string_column1' is greater than the 'string_column2'. | substring('abcddb', 1, 4) = abcd |
Trim - trim(string_column) | Returns the string with all spaces removed in prefix and suffix of the string. | trim(' abcd ') = abcd |
Uppercase - uppercase(string_column) | Returns the string 'string_column' with all characters changed to uppercase. | uppercase('abcD') = ABCD |
Statistical Functions |
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FUNCTION | DESCRIPTION | |
Mean - mean(numeric_column) | Returns the mean value of the 'numeric_column' | |
Median - (numeric_column) | Returns the middle value in the 'numeric_column' | |
Mode - mode(numeric_column) | Returns the most common value in the 'numeric_column | |
Logical Functions |
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FUNCTION | DESCRIPTION | EXAMPLE |
IF - if(expr1,expr2,expr3) | Returns expr2 if expr1 is true else it returns expr3 | if(5> 10,100,50) = 50 |
Ifnull - ifnull(expr1,expr2) | Returns expr1 if expr1 is not null, else it return expr2 | ifnull(null,10) = 10 |
isnull( ) - isnull(expr1) | Returns 1 if expr1 is null, else it returns 0. | isnull(null)- 1 |
General Functions |
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FUNCTION | DESCRIPTION | EXAMPLE |
Coalesce - coalesce(null,null,1,...) | Returns 1 if expr1 is null, else it returns 0. | coalesce(null,null,4) = 4 |
Formula columns are similar to other columns of the table. You can make use of existing formula columns while creating a new formula column, as you do with other columns of the table. Reusing existing formulas column to create new formula columns helps you create powerful formula combination, as well as eases in maintenance of these formula structure in your database. Refer to the above section to know how to create formula column.
Formula Columns can be used while creating reports as you would use a column in a table. When you create a new report over the table, in which you have added the Formula Column column, all these formula columns will be listed in the Columns list pane on the left, which can be drag and drop to create the report. You can apply functions on the formula column, as you do for other columns, using the combo box that is displayed over the column when dropped in the design area of the report.
The following screenshot shows the Payment Date formula column listed in the columns list page:
Once a Formula Column column is created, it behaves like any other column in a table. When you share a table, all the existing Formula Columns will also be shared to the user.
Note:
In reporting the most common data analysis that we do is to apply aggregate functions over the data (like SUM, AVG, COUNT etc.,) and analyze the same. The important aspect to be taken care in such calculations is to compute the aggregation in the context in which the function is applied to provide accurate results. Aggregate Formulas in SkyDesk Reports is meant to address this need.
Aggregate Formulas are formulas that you define in SkyDesk Reports which uses at least one aggregate function (SUM, AVG..) in the calculation. The output of such calculations is always a numeric value (metric). Aggregate formulas are mainly used in creating powerful reports. These formulas can be used in Charts, Pivot Tables and Summary View report types in SkyDesk Reports.
SkyDesk Reports offers a range of in-built aggregate functions which can be used as part of the Aggregate Formulas. You can construct the formulas using these in-built aggregate functions combining it with the basic arithmetic operators like +, -, / and *.
To create an aggregate formula:
The result of Aggregate Formulas will not be added as a column in the base table. It will be listed in the column panel while creating reports . You can access (view) or edit it by clicking Add > Edit Formulas in the toolbar. Viewing & Editing Formulas is discussed in the next section.
While you create an aggregate formula you can use a wide range of powerful in-built functions that are supported by SkyDesk Reports. You can use the in-built functions, that are applicable while creating Formula Columns, even when you create an Aggregate formula, provided it meets the required conditions for an Aggregate formula. There are also specific functions which are more relevant & applicable for creating Aggregate formulas. The following table describes these functions:
FUNCTION | DESCRIPTION |
Sum - sum(numeric_column) | Returns the sum of the 'numeric_column' |
Avg - avg(numeric_column) | Returns the average of the 'numeric_column' |
Min - Min(numberic_column) | Returns the minimum of the 'numeric column' |
Max - max(numeric_column) | Returns the maximum of the 'numeric_column' |
Count - count(column) | Returns the number of rows (values) in the given column |
Stddev - stddev(numeric_column) | Returns the standard deviation of the 'numeric_column' |
Variance - variance(numeric_column) | Returns the variance of the 'numeric_column' |
Distinct Count - count(distinct(column)) | Returns the distinct number of values (rows) in the given column. |
SumIf - sumif(condition, expr1, expr2) | Returns the sum of expr1, if condition is true. Else it will return the sum of expr 2. The expr1 and the expr2 can be an expression or just a numeric column. The expr2 is an optional argument. Example: sumif(Region = 'East, Sales, 0) will return the sum of values in the sales column for all the records which matches the value East in the Region column. Else it will return 0. |
AvgIf - avgif(condition, expr1, expr2) | Returns the average of expr1, if condition is true. Else it will return the average of expr 2. The expr1 and the expr2 can be an expression or just a numeric column. The expr2 is an optional argument. Example: avgif(Region = 'East, Sales, 0) will return the average of values in the sales column for all the records which matches the value East in the Region column. Else it will return 0. |
CountIf- countif(condition) | Returns the number of rows (records) that satisfies the condition. Example: countif(Region='East') will return the number of rows (records) in the table which matches the value East in the Region column. |
YTD - YTD(AggExpr,Date_Col) | Year-to-date is a period, starting from the beginning of the current year and ends at the current day. Arguments: AggExpr - Should be a Aggregate expression (which uses aggregate functions like SUM, AVG, ... ) for which the Year to date value will be calculated Date_Col - Should be a date column based on which Year to Date will be calculated. Example: YTD(Sum(sales), OrderDate) will return the Sum of sales for the current Year till current day, based on date column 'OrderDat |
QTD - QTD(AggExpr,Date_Col) | Quarter-to-date is a period, starting from the beginning of the current quarter and ends at the current day. Arguments : AggExpr - Should be a Aggregate expression (which uses aggregate functions like SUM, AVG, ... ) for which the Quarter to date value will be calculated Date_Col - Should be a date column based on which Quarter to Date will be calculated. Example : QTD(Sum(sales), OrderDate) will return the Sum of sales for the current Quarter till current day, based on date column 'OrderDate'. |
MTD - MTD(AggExpr,Date_Col) | Month-to-date is a period, starting from the beginning of the current month and ends at the current day. Arguments : AggExpr - Should be a Aggregate expression (which uses aggregate functions like SUM, AVG, ... ) for which the Month to date value will be calculated Date_Col - Should be a date column based on which Month to Date will be calculated. Example : MTD(Sum(sales), OrderDate) will return the Sum of sales for the current Month till current day, based on date column 'OrderDate'. |
SkyDesk Reports enables you to build aggregate formulas using existing aggregate formulas. Reusing existing formulas to create new aggregate formula helps you create powerful formula combination, as well as eases maintenance of these formula structure in your database.
When you create a new aggregate formula, existing formulas will be listed in the Click to Insert Columns box along with other columns. All the aggregate formulas will be indicated in brown with the ∑ symbol. You can insert these formulas into your new formula definition by clicking them, as you do for the other columns in the table.
For example, Let's assume that you have already calculated profit percentage and total cost and you want to calculate total profit gained. Then you can use the existing aggregate formulas to calculate total profit gained. The formula could be something like ("Total Cost" * "Profit") / 100.
Aggregate formulas can be used while creating all reports (charts, pivot tables and summary views) as you would use a column in a table. When you create a new report over the table, in which you have added the aggregate formula, all the formulas will be listed in the Columns list pane on the left, which can be drag & dropped to create the report.
The following screenshot shows the % Profit aggregate formula, that we added, listed in the columns list page. All the aggregate formulas will be indicated with an icon which contains the symbol.
From the Explorer tab of the reporting database, select the table to which you want to add the aggregate formula.
Aggregate formulas can be used in the report as you use any other data columns in the table. The value of the aggregate formula will be computed for each data point that is displayed in the report in which it is used (i.e., the result is not just a single value). In the chart shown in the screenshot below, the percentage of profit (%Profit) is plotted against the Year. As you see, the value of the Profit percentage is calculated for each year and plotted in the graph.
When you use an Aggregate formula in a report, you will not be able to apply other functions on the formula (as you do for other columns). The function will always be selected as 'Actual' and cannot be modified.
With respect to sharing and collaboration , Aggregate Formulas behave similar to how a column in a table behaves. When you share a table, all the aggregate formulas that are created over the table will be also shared to the user to whom you are sharing the table. Hence the shared user will be able to use these formulas while creating any report over the data table.
Note:
SkyDesk Reports allows you to view, edit, format and delete all the formulas defined for a table through the Edit Formula option. You can view & edit both Formula Columns and Aggregate Formulas using this option. To view/edit existing custom or aggregate formulas: