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日本語
  • PowerCenter 10.4.0
  • 所有产品

目次

Search

  1. はじめに
  2. XMLの概念
  3. PowerCenterでのXMLの使用
  4. XMLソースに関する作業
  5. XMLエディタの使用
  6. XMLターゲットに関する作業
  7. XML Source Qualifierトランスフォーメーション
  8. Midstream XMLトランスフォーメーション
  9. XMLデータ型リファレンス
  10. XPathクエリ関数の参照

XMLガイド

XMLガイド

前へ 次へ

substring-before

substring-before

サブストリングの前に出現する文字列の一部を返します。

構文

substring-before ( 
string, substring 
)
以下の表に、この関数の引数を示します。
引数
説明
string
文字列データ型。検索する文字列を渡します。
substring
文字列データ型。文字列内で検索するサブストリングを渡します。

戻り値

文字列。
サブストリングが見つからない場合は空の文字列です。
関数にNULL値を渡した場合はNULLです。

例

次の式は、Third Street Addressで出現する数値を返します。 
substring-before ( ADDRESS, Third Street )
以下の表に、属性および戻り値の例を示します。 
ADDRESS 
RETURN VALUE
 
100 Third Street
100
250 Third Street
250
600 Third Street
600
NULL
NULL