在sqlServer中字符串中连续的空格数据量是无法判断的，以下是测试脚本：
DROP TABLE [dbo].[TestTable]
CREATE TABLE [dbo].[TestTable](
[Id] [int] NOT NULL,
[Name] [char](5) COLLATE sql_latin1_General_CP1_CI_AS NOT NULL,
CONSTRAINT [PK_TestTable] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (IGnorE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
insert into TestTable(id,[Name]) values (1,'')
insert into TestTable(id,[Name]) values (2,' ')
insert into TestTable(id,[Name]) values (3,' ')
select id,'XX' + [Name] + 'YY' from TestTable where [Name] = ''
select id,'XX' + [Name] + 'YY' from TestTable where [Name] = ' '
select id,'XX' + [Name] + 'YY' from TestTable where [Name] = ' '
exec sp_executesql N'SELECT * FROM [dbo].[TestTable] WHERE ([Name] <> @Name1 )',N'@Name1 char(1)',@Name1=' '
exec sp_executesql N'SELECT * FROM [dbo].[TestTable] WHERE ([Name] <> @Name1 )',N'@Name1 char(8000)',N'@Name1 varchar(1)',@Name1=' '
exec sp_executesql N'SELECT * FROM [dbo].[TestTable] WHERE ([Name] = @Name1 )',@Name1=' ' exec sp_executesql N'SELECT * FROM [dbo].[TestTable] WHERE ([Name] = @Name1 )',N'@Name1 varchar(5)',@Name1=' '
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 [email protected] 举报，一经查实，本站将立刻删除。
