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oracle merge

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merge into table...
when matched then update set
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delete where use_yn = 'D'
....


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merge into table...
when matched then update set
    use_yn = 'D'
delete where use_yn = 'N' -- ±âÁ¸¿¡ NÀ¸·Î µÇ¾îÀÖ´Â°É D·Î º¯°æ ÇÑ µÚ »èÁ¦ÇÏ·Á°íÇß¾úÀ½..
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