postgresql
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编辑 删除
2013-03-08
1.去重根据某一字段去重select distinct on(a) * from t;根据某一字段，及字段排序去重select distinct on(a) * from t order by a,b;2.将以逗号分隔的字符串转换成数组v_checkitems_array text[];v_checkite...
