vault backup: 2025-07-17 22:05:34
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@ -448,7 +448,7 @@ LEN函数用于计算文本字符串中的字符数。基本语法:
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## LEFT 从左侧提取指定数量的字符
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LEFT函数用于从文本字符串的左侧提取指定数量的字符。基本语法:
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`LEFT` 函数用于从文本字符串的左侧提取指定数量的字符。基本语法:
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> `=LEFT(text, [num_chars])`
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