整理声明的SQL变量
我一直在看下面复制的,寻找非ASCII字符整理声明的SQL变量,sql,sql-server,tsql,collate,Sql,Sql Server,Tsql,Collate,我一直在看下面复制的,寻找非ASCII字符 select line, patindex('%[^ !-~]%' COLLATE Latin1_General_BIN, Line) as [Position], substring(Line, patindex('%[^ !-~]%' COLLATE Latin1_General_BIN, Line), 1) as [InvalidCharacter], ascii(substring(line, patindex('%[^ !-~]%
select line,
patindex('%[^ !-~]%' COLLATE Latin1_General_BIN, Line) as [Position],
substring(Line, patindex('%[^ !-~]%' COLLATE Latin1_General_BIN, Line), 1) as [InvalidCharacter],
ascii(substring(line, patindex('%[^ !-~]%' COLLATE Latin1_General_BIN, Line), 1)) as [ASCIICode]
from staging.APARMRE1
where patindex('%[^ !-~]%' COLLATE Latin1_General_BIN, Line) > 0
我突然想到,我想为“%[^!-~]%”声明一个变量,而不是每次都写出来,但是
declare @regex varchar(20) = '%[^ !-~]%' COLLATE Latin1_General_BIN;
select line,
patindex(@regex, Line) as [Position],
substring(Line, patindex(@regex, Line), 1) as [InvalidCharacter],
ascii(substring(line, patindex(@regex, Line), 1)) as [ASCIICode]
from staging.APARMRE1
where patindex(@regex, Line) > 0
只是不做同样的事。我只是缺少一些语法吗?这是不可能的吗?这是正常的。创建变量时,它采用数据库的默认排序规则
DECLARE @regex varchar(20) = '%[^ !-~]%' COLLATE Latin1_General_BIN;
带有COLLATE-Latin1\u-General\u-BIN
的字符串被隐式转换为带有数据库默认排序规则的字符串
例如,数据库不区分大小写。我使用您的语法创建区分大小写的语法并检查其元数据:
DECLARE @v1 varchar(100) = 'ABC' COLLATE Latin1_General_CS_AS;
SELECT name, collation_name
FROM sys.dm_exec_describe_first_result_set(
N'SELECT @v1 AS [@v1]', N'@v1 varchar(100)', 0);
输出:
╔══════╦══════════════════════════════╗
║ name ║ collation_name ║
╠══════╬══════════════════════════════╣
║ @v1 ║ SQL_Latin1_General_CP1_CI_AS ║
╚══════╩══════════════════════════════╝
变量(不包括表变量中的列)不允许定义排序规则,因此没有如下语法:
DECLARE @v1 varchar(100) COLLATE Latin1_General_CS_AS = 'ABC' ;
-- Incorrect syntax near the keyword 'COLLATE'.
关于您提到的例外情况:表变量。。。对于表类型,当我将数据传递到具有特定排序规则的表类型时,它会将输入数据强制转换到表类型列定义的排序规则中吗?