GROUP BY 子句和 HAVING 子句。，，``sql，SELECT column_name, COUNT(*)，FROM table_name，GROUP BY column_name，HAVING COUNT(*) > 1;，``，，这段代码会返回在指定列中出现次数超过一次的所有值及其出现次数。GROUP BY 子句和 HAVING 子句。，，``sql，SELECT column_name, COUNT(*)，FROM table_name，GROUP BY column_name，HAVING COUNT(*) > 1;，``，，这段代码会返回在指定列中出现次数超过一次的所有值及其出现次数。Powered By Z-BlogPHP 1.7.3
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