In SQL Server, we can use the DATETRUNC() function to truncate a date/time value to a specified precision.
For example, we could use it to truncate a date value like 2024-10-25 to 2024-01-01, or a time value like 10:35:12 to 10:00:00.
The DATETRUNC() function was introduced in SQL Server 2022 (16.x).
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 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.
The SQL COUNT() function is a handy tool for telling us how many rows would be returned in a query. We can pass a column name to the function or we can pass the asterisk (*) wildcard to indicate all columns.
If a column contains NULL values, we could get different results, depending on whether we use the column name or the asterisk (*).
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.