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22 gru 2022 · When NULL, the CASE expression misses the entry and returns 'Forth Coming Titles'; since it is not NULL the COALESCE returns the same. – Diego-MX Commented Jan 8, 2015 at 16:53
5 lut 2024 · Learn how to use the CASE statement in MySQL to check if a value is null and replace it with a different value. See the syntax, an example table, and the output of the query.
So, once a condition is true, it will stop reading and return the result. If no conditions are true, it will return the value in the ELSE clause. If there is no ELSE part and no conditions are true, it returns NULL. Required. The conditions. These are evaluated in the same order as they are listed. Required.
CASE returns the result in the ELSE clause if the ELSE clause is specified. The CASE compares the value with values in the WHEN clauses for equality, you cannot use it with NULL because NULL = NULL returns false. The following shows the syntax of a searched CASE expression: WHEN expression1 THEN result1. WHEN expression2 THEN result2.
Learn how to use CASE, IF, and NULLIF functions to perform conditional logic in MySQL queries. See syntax, examples, and return types for each function.
The CASE statement cannot have an ELSE NULL clause, and it is terminated with END CASE instead of END. For the first syntax, case_value is an expression. This value is compared to the when_value expression in each WHEN clause until one of them is equal.
24 maj 2018 · CASE WHEN state IS NULL THEN 'N/A' ELSE state END You can also use the coalesce function: COALESCE(<VALUE>,<OUTPUT IF NULL>) The COALESCE function translates well this code: CASE WHEN <value> IS NOT NULL THEN <value> ELSE <value_2> END Coalesce returns the first non null value in the list.
