MySQL :: MySQL 5.0 Reference Manual :: 13.2.8 SELECT Syntax

MySQL :: MySQL 5.0 Reference Manual :: 13.2.8 SELECT Syntax

瀏覽:592
日期:2025-04-25
A select_expr can be given an alias using AS alias_name. The alias is used as the expression's column name and can be used in GROUP BY, ORDER BY, or HAVING clauses. For example: SELECT CONCAT(last_name ......看更多