Oracle-PL/SQL

Oracle LPAD 函数详解

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本文详细介绍了 Oracle/PLSQL 中的 LPAD 函数，该函数用于在字符串左侧填充特定字符，以达到指定长度。文章提供了 LPAD 函数的语法说明及多个使用示例。

一.函数
1.Lpad/Rpad

In Oracle/PLSQL, the lpad function pads the left-side of a string with a specific set of characters.

The syntax for the lpad function is:

lpad( string1, padded_length, [ pad_string ] )

string1 is the string to pad characters to (the left-hand side).

padded_length is the number of characters to return. If the padded_length is smaller than the original string, the lpad function will truncate the string to the size of padded_length.

pad_string is optional. This is the string that will be padded to the left-hand side of string1. If this parameter is omitted, the lpad function will pad spaces to the left-side of string1.

For example:

lpad('tech', 7); would return ' tech'
lpad('tech', 2); would return 'te'
lpad('tech', 8, '0'); would return '0000tech'
lpad('tech on the net', 15, 'z'); would return 'tech on the net'
lpad('tech on the net', 16, 'z'); would return 'ztech on the net'

Oracle/PLSQL: Lpad Function

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