Home Database Mysql Tutorial Oracle数据库操作时如何使用LOWER()、UPPER()函数

Oracle数据库操作时如何使用LOWER()、UPPER()函数

Jun 07, 2016 pm 04:22 PM
oracle use how operate database

Oracle LOWER() 和 UPPER()函数的使用方法 一列返回行不区分大小写 这是常见的做法,使列不区分大小写,以确保您所希望返回所有行。 SELECT * FROM COURSES WHERE LOWER(education_delivery_method) = 'classroom' 您可以使用Oracle的UPPER() or LOWER() 函

Oracle LOWER() 和 UPPER()函数的使用方法

一列返回行不区分大小写
这是常见的做法,使列不区分大小写,以确保您所希望返回所有行。
 

SELECT *
FROM  COURSES
WHERE  LOWER(education_delivery_method)  = 'classroom'


您可以使用Oracle的UPPER() or LOWER() 函数来在你的SQL选择格式列

SELECT
  UPPER(FIRSTNAME) AS "FIRSTNAME",
  LASTNAME
FROM STUDENTS
WHERE RowNum  

格式一列使用上下功能
它可以使用与串()一起下的Oracle UPPER() or LOWER()函数函数来完成不同类型的格式。

 

SELECT
  UPPER(SUBSTR(LASTNAME,1,1)) || LOWER(SUBSTR(LASTNAME,2,29))
FROM STUDENTS
WHERE RowNum 更新一组行的变化情况
它可以使用一个更新语句Oracle的 UPPER() or LOWER()函数一起使用,,以改变“案“的一组行。


UPDATE STUDENTS
SET    LASTNAME = UPPER(LASTNAME)
WHERE  LASTNAME  = 'Jones' 
/

COMMIT WORK ;

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