# SELECT 字串相加 遇到null值 ###### tags: `SQL` `ORACLE` `MSSQL` MSSQL Select時進行字串相加時, 如任一欄位有一資料為NULL時,字串相加出來的欄位值便會為NULL。 只要Select command前先加上 SET CONCAT_NULL_YIELDS_NULL OFF 即可正常與NULL進行字串相加。 --- ORACLE 可以正常相加
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