SELECT用于返回表和用户定义的函数中的行,具体语法如下
[ WITH with_subquery [, ...] ]
SELECT
[ [ ALL | DISTINCT ] | select_expr [ AS output_name ] [, ...] ]
[ FROM table_reference [, ...] ]
[ WHERE condition ]
[ GROUP BY expression [, ...] ]
[ HAVING condition ]
[ { UNION | ALL | INTERSECT | EXCEPT | MINUS } query ]
[ ORDER BY expression
[ ASC | DESC ]
[ LIMIT { number | ALL } ]
本节包含以下几个部分:
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