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	<title>유니온 &#8211; Minhwan Record</title>
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	<description>기록</description>
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		<title>[MSSQL] UNION, UNION ALL, 유니온</title>
		<link>https://wp.goodzz.shop/dev/mssql/1961</link>
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		<pubDate>Wed, 27 Dec 2023 04:06:57 +0000</pubDate>
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					<description><![CDATA[https://blog.naver.com/diceworld/220148969511 &#160;&#8211;&#160;UNION 문이란? &#160;​ &#160;&#160;두개 이상의 쿼리 결과를 하나의 테이블로 합쳐서 표시하는데 이용됩니다.​ &#160;&#8211;&#160;MSSQL UNION 사용방법 &#160;​&#160;&#160;&#160;[쿼리문1]&#160;UNION&#160;[쿼리문2]​ &#160;&#8211; UNION 특징 &#160;&#160; &#160;쿼리문1과 쿼리문2의 컬럼수는 동일해야 한다.&#160; &#160;쿼리문1과 쿼리문2의 컬럼타입은 같거나 서로 변환가능한 값이어야 한다.&#160; &#160;UNION으로 합쳐진 테이블은 중복값이 사라진다.​ &#160;&#8211; A반출석부 테이블 생성 &#160;&#160;&#160; CREATE TABLE&#160;dbo.A반출석부&#160;(&#160;&#160;&#160;&#160; &#160;&#160;일련번호&#160;int&#160;NOT NULL,&#160;&#160;&#160;&#160; &#160;&#160;이름&#160;varchar(6) NOT NULL&#160;&#160;&#160;)​ &#160;&#8211; 데이터 입력 &#160;&#160;&#160;&#160;INSERT [&#8230;]]]></description>
		
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