SQL LCASE() 函数
LCASE() 函数
LCASE() 函数把字段的值转换为小写。
SQL LCASE() 语法
SELECT LCASE(column_name) FROM table_name;
用于 SQL Server 的语法
SELECT LOWER(column_name) FROM table_name;
演示数据库
在本教程中,我们将使用众所周知的 Northwind 样本数据库。
下面是选自 "Customers" 表的数据:
CustomerID
CustomerName
ContactName
Address
City
PostalCode
Country
1
Alfreds Futterkiste
Maria Anders
Obere Str. 57
Berlin
12209
Germany
2
Ana Trujillo Emparedados y helados
Ana Trujillo
Avda. de la Constituci n 2222
M xico D.F.
05021
Mexico
3
Antonio Moreno Taquer a
Antonio Moreno
Mataderos 2312
M xico D.F.
05023
Mexico
4
Around the Horn
Thomas Hardy
120 Hanover Sq.
London
WA1 1DP
UK
5
Berglunds snabbk p
Christina Berglund
Berguvsv gen 8
Lule
S-958 22
Sweden
SQL LCASE() 实例
下面的 SQL 语句从 "Customers" 表中选取 "CustomerName" 和 "City" 列,并把 "CustomerName" 列的值转换为小写:
实例
SELECT LCASE(CustomerName) AS Customer, City
FROM Customers;