sql，SELECT column_name, COUNT(*)，FROM table_name，GROUP BY column_name，HAVING COUNT(*) > 1;，``，，这将返回所有在指定列中重复的记录及其出现次数。sql，SELECT column_name, COUNT(*)，FROM table_name，GROUP BY column_name，HAVING COUNT(*) > 1;，``，，这将返回所有在指定列中重复的记录及其出现次数。Powered By Z-BlogPHP 1.7.3
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