GROUP BY和HAVING子句。，，``sql，SELECT column_name, COUNT(*)，FROM table_name，GROUP BY column_name，HAVING COUNT(*) > 1;，`，，将column_name替换为你要检查重复的列名，将table_name`替换为你的表名。这段SQL语句会返回所有在指定列中出现次数超过1次的数据，即重复数据。GROUP BY和HAVING子句。，，``sql，SELECT column_name, COUNT(*)，FROM table_name，GROUP BY column_name，HAVING COUNT(*) > 1;，`，，将column_name替换为你要检查重复的列名，将table_name`替换为你的表名。这段SQL语句会返回所有在指定列中出现次数超过1次的数据，即重复数据。Powered By Z-BlogPHP 1.7.3
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