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Message: <blockquote data-quote="saja" data-source="post: 22492937" data-attributes="member: 14999"><p><span style="font-size: 12px"><span style="color: Blue">Category : SQL SERVER </span></span></p><p><span style="font-size: 12px"><span style="color: Blue">Target Group : Software Engineer , Software Developer </span></span></p><p></p><p><span style="font-size: 12px"><span style="color: Black">Union Vs Union All</span></span></p><p><span style="font-size: 12px"><span style="color: Black">•    UNION removes duplicate records (where all columns in the results are the same), </span></span></p><p><span style="font-size: 12px"><span style="color: Black">•    UNION ALL does not.</span></span></p><p><span style="font-size: 12px"><span style="color: Black">•    There is a performance hit when using UNION vs UNION ALL, since the database server must do additional work to remove the duplicate rows</span></span></p><p><span style="font-size: 12px"><span style="color: Black"></span></span></p></blockquote><p></p>

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