DISTINCT 关键字。，，``sql，SELECT DISTINCT column1, column2，FROM table1，JOIN table2 ON table1.id = table2.id;，``，，这样可以确保结果集中没有重复的行。DISTINCT 关键字。，，``sql，SELECT DISTINCT column1, column2，FROM table1，JOIN table2 ON table1.id = table2.id;，``，，这样可以确保结果集中没有重复的行。SELECT DISTINCT 关键字来执行不重复查询。Powered By Z-BlogPHP 1.7.3
Copyright Your WebSite.Some Rights Reserved.