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Ispirer SQLWays Database Migration Software
COALESCE
Syntax
COALESCE(expr, expr2 {, expr })
COALESCE returns the first argument that is not NULL. The arguments are evaluated in the order in which they are specified. This function is usually used to replace NULL values with a not NULL value.
Example
This example selects title and price for all books. If the price for a given title is NULL, the price shown is 0.00.
SELECT title, COALESCE(price, 0.00) AS price FROM titles;
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