2014年3月2日

GROUP_CONCAT(expr)

摘要： This function returns a string result with the concatenated non-NULLvalues from a group. It returnsNULLif there are no non-NULLvalues. The full syntax is as follows:GROUP_CONCAT([DISTINCT] expr [,expr ...] [ORDER BY {unsigned_integer | col_name | expr} [ASC | DESC] [,col_... 阅读全文

posted @ 2014-03-02 14:04 Still water run deep 阅读(456) 评论(0) 推荐(0)

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