Question

我使用REXTESTER编写一段SQL Server代码。

它表示正在使用它的SQL Server 2014 Express Edition ......

这是导致消息的最小代码。

CREATE PROCEDURE #CONVERT_TIME_TO_24_HR
(
  @TIME_STRING varchar(4)
)
AS
BEGIN
  DECLARE @AMPM as varchar(2);
  SET @AMPM = RIGHT(@TIME_STRING,2);
  IF @AMPM = 'am'
    SELECT 2
END
GO

这是错误：

Error(s), warning(s):
Cannot resolve the collation conflict between "SQL_Latin1_General_CP1_CI_AS" and "Latin1_General_CI_AS" in the equal to operation.

如果刚刚声明@TIME_STRING而不是存储过程的参数，我就不会有问题。由于我无法控制SQL Server实例，我该如何解决这个问题？

如果forked version不是参数，那么这是here - 没有问题

DECLARE @TIME_STRING varchar(4);
DECLARE @AMPM as varchar(2);
SET @AMPM = RIGHT(@TIME_STRING,2);
  IF @AMPM = 'am'
    SELECT 2

Answer 1

这是因为服务器/数据库/列的排序规则具有不同的值（可能是服务器和数据库）。您可以通过显式添加排序规则来修复它：

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我承认这不是一个常见的专栏。在您自己的系统上，默认排序规则可能都匹配。我不知道为什么Rextester的设计师会有不同的默认排序规则。

Answer 2

另一个解决方案（对于戈登的解决方案+1）将使用COLLATE DATABASE_DEFAULT，这意味着当前数据库的整理。以下示例基于以下排序规则：

＆＃39; Latin1_General_CI_AS＆＃39;对于tempdb数据库
＆＃39; Romanian_CI_AS＆＃39; for current - DbCollateDiffThanTempDbCollat - database。

由于CREATE PROCEDURE #...语句在DbCollateDiffThanTempDbCollat数据库的上下文中使用COLLATE DATABASE_DEFAULT选项执行，这意味着IF @AMPM = 'am' COLLATE DATABASE_DEFAULT与IF @AMPM = 'am' COLLATE Romanian_CI_AS等效（在此上下文中）。

SELECT DATABASEPROPERTYEX('tempdb', 'Collation')
/*

---------------------
Latin1_General_CI_AS
*/
GO

CREATE DATABASE DbCollateDiffThanTempDbCollat
COLLATE Romanian_CI_AS
GO
USE DbCollateDiffThanTempDbCollat
GO
SELECT DATABASEPROPERTYEX('DbCollateDiffThanTempDbCollat', 'Collation')
GO
/*

--------------
Romanian_CI_AS
*/

USE DbCollateDiffThanTempDbCollat -- Current database for COLLATE DEFAULT_DATABASE is DbCollateDiffThanTempDbCollat -> COLLATE Romanian_CI_AS
GO
CREATE PROCEDURE #CONVERT_TIME_TO_24_HR
(
  @TIME_STRING varchar(4)
)
AS
BEGIN
  DECLARE @AMPM as varchar(2);
  SET @AMPM = RIGHT(@TIME_STRING,2);
  IF @AMPM = 'am' COLLATE DATABASE_DEFAULT 
    SELECT 2
END
GO
/*
Command(s) completed successfully.
*/

排序规则冲突SQL Server varchar存储过程参数

2 个答案: