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SELECT LEAST( IFNULL(@column1, @column2), IFNULL(@column2, @column1) ) AS least_date; -- Returns: NULL (if both columns are null) or the least value
4 kwi 2024 · If one or more arguments aren't NULL, then NULL arguments are ignored during comparison. If all arguments are NULL, then LEAST returns NULL. Comparison of character arguments follows the rules of Collation Precedence (Transact-SQL).
The SQL functions greatest and least take one or more arguments and return the largest or smallest value if none of the arguments is null. SELECT GREATEST(1, 2, 3) FROM … Greatest and least are scalar functions, not aggregate functions.
Conditional expression functions. LEAST. Returns the smallest value from a list of expressions. LEAST supports all data types, including VARIANT. See also: LEAST_IGNORE_NULLS. Syntax. LEAST(( <expr1> [ , <expr2> ... ] ) Arguments. exprN. The arguments must include at least one expression.
Run a SELECT statement that returns the lowest non-null value in each row of the table: SELECT col_1 , col_2 , col_3 , col_4 , LEAST_IGNORE_NULLS ( col_1 , col_2 , col_3 , col_4 ) AS least_ignore_nulls FROM test_least_ignore_nulls ORDER BY col_1 ;
14 maj 2021 · To handle NULLs correctly, SQL provides two special comparison operators: IS NULL and IS NOT NULL. They return only true or false and are the best practice for incorporating NULL values into your queries.
The SQL Server ISNULL() function lets you return an alternative value when an expression is NULL: SELECT ProductName, UnitPrice * (UnitsInStock + ISNULL(UnitsOnOrder, 0)) FROM Products;
