oracle sql語句筆記

Oracle Sql 筆記 1.起別名的時候雙引號能夠保證名稱就是引號內內容 2. || 鏈接 SELECT LastName || Id AS AAA FROM employ; 3.Distinct 消除重複行 4.escape 轉義 select * from t_char where a like ‘%%%’ escape ‘’ 5.order by 排序 desc 降序 asc 升序web

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