![Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.when executing two merge queries - Stack Overflow Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.when executing two merge queries - Stack Overflow](https://i.stack.imgur.com/lAbkp.png)
Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.when executing two merge queries - Stack Overflow
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Only one expression can be specified in the select list when the sub query not introduced with Exist - YouTube
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