ORACLE_LPAD_FUNCTION

最新推荐文章于 2025-09-11 20:53:34 发布

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原文链接：http://www.cnblogs.com/yjhlsbnf/p/7790069.html

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#数据库

本文介绍了 Oracle/PLSQL 中的 LPAD 函数，详细解释了如何使用此函数为字符串左侧填充特定字符，并通过实例展示了不同参数组合下 LPAD 函数的应用效果。

Oracle / PLSQL: LPAD Function

This Oracle tutorial explains how to use the Oracle/PLSQL LPAD function with syntax and examples.

Description

The Oracle/PLSQL LPAD function pads the left-side of a string with a specific set of characters (when string1 is not null).

Syntax

The syntax for the LPAD function in Oracle/PLSQL is:

LPAD( string1, padded_length [, pad_string] )

Parameters or Arguments

string1

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

padded_length

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

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.

Returns

The LPAD function returns a string value.

Applies To

The LPAD function can be used in the following versions of Oracle/PLSQL:

Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i, Oracle 8i

Example

Let's look at some Oracle LPAD function examples and explore how to use the LPAD function in Oracle/PLSQL.

For example:

　table can use dual example.such as select lpad('tech',7) from dual;

LPAD('tech', 7);
Result: '   tech'

LPAD('tech', 2);
Result: 'te'

LPAD('tech', 8, '0');
Result: '0000tech'

LPAD('tech on the net', 15, 'z');
Result: 'tech on the net'

LPAD('tech on the net', 16, 'z');
Result: 'ztech on the net'

转载于:https://www.cnblogs.com/yjhlsbnf/p/7790069.html