In SQL Server, we can use the TRIM() function to remove leading and trailing characters from a given string.
A common use case is to remove whitespace from the start and end of the string, but we can also specify other characters to remove.
Also, as from SQL Server 2022, we can specify which side of the string to remove the characters from (i.e. leading, trailing, or both).
Continue readingIn SQL Server, we can use the T-SQL RTRIM() function to remove trailing blanks from a given string. Trailing blanks are white spaces, tabs, etc that come at the end of the string.
Also, as from SQL Server 2022, we can specify other trailing characters to remove from the string.
Continue readingIn SQL Server, we can use the T-SQL LTRIM() function to remove leading blanks from a given string.
Also, as from SQL Server 2022, we can specify other leading characters to remove from the string.
Continue readingIf you’re getting SQL Server error msg 402 that tells you the “data types” are “incompatible in the approx_percentile_cont operator“, it’s probably because you’re trying to apply the APPROX_PERCENTILE_CONT() function against a non-numeric column (or one that doesn’t evaluate to a numeric type).
When using the APPROX_PERCENTILE_CONT() function, the ORDER BY expression in the WITHIN GROUP clause must evaluate to an exact or approximate numeric type. Other data types are not allowed, and will result in the above error.
To fix this issue, be sure to apply the function against a numeric column/expression.
Continue readingIn SQL Server STRING_SPLIT() is a table-valued function that splits a string into rows of substrings, based on a specified separator character.
Each substring is returned on its own row, in a column called value.
In SQL Server the CHOOSE() function returns the item at the specified index from a list of values.
If you’re getting SQL Server error 10754 that reads “The function ‘APPROX_PERCENTILE_CONT’ must have a WITHIN GROUP clause” it’s probably because you’re calling the APPROX_PERCENTILE_CONT() function, but you’ve omitted the WITHIN GROUP clause.
To fix this issue, add a WITHIN GROUP clause to the function (and make sure it has an ORDER BY clause).
SQL Server 2022 introduced the LEAST() function, which at first glance, may seem to do the same thing as the already existing MIN() function.
However, these are two separate functions with two separate purposes.
Continue readingIn SQL Server the VARP() function returns the statistical variance for the population for all values in the specified expression.
In SQL Server the VAR() function returns the statistical variance of all values in the specified expression.