AS 关键字为查询结果中的列或表指定别名。，，``sql，SELECT column_name AS alias_name FROM table_name;，``AS 关键字为查询结果中的列或表指定别名。，，``sql，SELECT column_name AS alias_name FROM table_name;，``AS 关键字给表取别名，SELECT * FROM table_name AS alias;。Powered By Z-BlogPHP 1.7.3
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