文件名称：字符函数-SQL语言基础
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更新时间：2024-05-15 13:24:52
SQL 基础
字符函数 * 字符函数 LOWER UPPER INITCAP CONCAT SUBSTR LENGTH INSTR LPAD TRIM 大小写转换函数 字符操作函数 * Character Functions Single-row character functions accept character data as input and can return both character and number values. Character functions can be divided into the following: Case conversion functions Character manipulation functions Note: The functions discussed in this lesson is a subset of the available functions.