运行 sp_executesql 查询需要参数@statement [英] Running sp_executesql query expects parameter @statement

问题描述

我不知道如何解决这个错误:

I'm not sure how to resolve this error:

过程或函数sp_executesql"需要未提供的参数@statement".

对于这个查询:

DECLARE @a INT 
DECLARE @b VARCHAR 
SET @a = 1

WHILE @a < 30
BEGIN
set @b = @a  
exec sp_executesql update source_temp set pmt_90_day = pmt_90_day + convert(money,'trans_total_'+@b)+N'
    N'where convert(datetime,'effective_date_'+@b)+N' <= dateadd(day,90,ORSA_CHARGE_OFF_DATE)
    and DRC_FLAG_'+@b = 'C'''

SET @a = @a + 1
END

另外，你能帮我理解 N' 的正确用法吗，以及它在这个语句中是否正确使用.

Also, can you help me understand the proper usage of N' and if its done correctly in this statement.

感谢您的帮助.

推荐答案

sp_executesql"存储过程需要单个字符串参数@statement 来执行.

The "sp_executesql" stored proc expects a single string parameter @statement to execute.

您的字符串在这里完全不正常.....您需要在任何固定"字符串部分前面加上 N'......' 以使其成为 Unicode 字符串，但这绝对不是正确的案例在这里.

Your string is totally out of whack here..... you need to prefix any "fixed" string parts with a N'......' to make them Unicode strings, but this is definitely not properly the case here.

我想你可能想试试这个:

I think you might want to try this:

DECLARE @a INT 
DECLARE @b VARCHAR(2)

SET @a = 1

DECLARE @statement NVARCHAR(500)

WHILE @a < 30
BEGIN
    SET @b = CAST(@a AS VARCHAR(2))

    SET @statement = 
        N'update source_temp set pmt_90_day = pmt_90_day + ' + 
             'convert(money, ''trans_total_' + @b + ''') ' + 
             'where convert(datetime, ''effective_date_' + @b + ''')' +
             ' <= DATEADD(DAY, 90, ORSA_CHARGE_OFF_DATE) ' +
             'and DRC_FLAG_' + @b + ' = ''C'''

    exec sp_executesql @statement

    SET @a = @a + 1
END

这是否有效并达到您的预期?

Does this work and do what you expect it to do??

说明:N'.........' 分隔包含 SQL 语句的整个字符串.必须复制(转义")内的任何撇号.我希望我能正确理解你的逻辑.

Explanation: the N'.........' delimits the whole string which contains the SQL statement. Any apostrophe inside that has to be duplicated ("escaped"). I hope I understood your logic correctly.

马克

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