別紙： 組み込み関数対応表（Oracle-PostgreSQL）
、PostgreSQLでは引数がcharacter型でも戻り値はtext型（空白があ れば削除される）となる点に注意 char のデータベース・キャラクタ・セットでの10 進表記を戻す。 substring が現れる位置を戻す。 char の長さを文字単位で戻す。 REGEXP_COUNT (source_char, pattern [,
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組み込み関数移行調査編 - pgecons.org
www.pgecons.orgはじめに 本資料の目的 本資料は、異種DBMSからPostgreSQLへ組み込み関数を移行する作業の難易度、ボリュームを事前に判断するため
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