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MERGE文が意外と遅い(C#でCSV取り込み(SQLSERVER))

Posted at

MERGE

・1レコードずつMERGEを実行する…2000件で1分ほど
 ↓
・コマンドを作成後、一括して実行…2000件で45秒ほど

#SELECTで存在チェック後、INSERT、UPDATE
・1レコードずつ存在チェック後、INSERT、UPDATE…2000件で1分半ほど
 ↓
・1レコードずつ存在チェック後、INSERT、UPDATEを一括実行…2000件で15秒半ほど

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