Question

我无法从查找表填充的查找光标中解析变量。

这与我之前的问题非常相似：

Dynamic MS SQL Variable Parsing incorrectly

但是现在我从查询表中提供了@tablename和@columnname，这导致我错过了列名周围的[和]。< / p>

DECLARE 
    @tableName SYSNAME,
    @columnName SYSNAME,
    @col2 SYSNAME,
    @prompt SYSNAME,
    @dynSQL varchar(MAX);

Declare cLookup CURSOR FOR
    SELECT * 
    FROM LookupTbl

OPEN cLookup

FETCH NEXT FROM cLookup INTO @tableName, @columnName, @prompt

WHILE @@FETCH_STATUS = 0
BEGIN
    set @dynSQL = N'INSERT INTO <tableName>
        ([trav num], <columnname>)
        Select [trav num], <columnname>
        FROM [temprmi$] t1
        PIVOT(min([Lvl1 Trace Data])
        FOR [Prompt Text] IN (<columnname>)
           ) AS PVTTable
             where <columnname> is not null and [trav num] not in (select [trav num] from <tablename>)'

    SET @dynSQL = REPLACE(REPLACE(@dynSQL, '<tablename>', @tablename),'<columnname>',@columnname);

    print @dynSQL
    Print 'Done with '+ @tableName
    FETCH NEXT FROM cLookup
    INTO @tableName, @columnName, @prompt

end
Close cLookup
Deallocate cLookup

查找表：

TableName       ColumnName                  Prompt
A1-ExciseESN    Anode Excise ESN (A1)       NULL
A1-Excise DT    Anode ExciseDate&Time(A1)   NULL
A1-Excise DT-1  AnodeExcieDate&Time(A1)-1   NULL
StackFixture    Stack Fixture               NULL

见下面的输出。我错过了列名称周围的[和]。

输出：

INSERT INTO A1-ExciseESN
        ([trav num], Anode Excise ESN (A1))
        Select [trav num], Anode Excise ESN (A1)
        FROM [temprmi$] t1
        PIVOT(min([Lvl1 Trace Data])
        FOR [Prompt Text] IN (Anode Excise ESN (A1))
           ) AS PVTTable
             where Anode Excise ESN (A1) is not null and [trav num] not in (select [trav num] from A1-ExciseESN)

Answer 1

有一个名为QUOTENAME的函数可以完全执行此操作：

SET @dynSQL = REPLACE(
               REPLACE(
                @dynSQL
                ,'<tablename>'
                , QUOTENAME(@tablename)
                )
              ,'<columnname>',QUOTENAME(@columnname)
               )

e.g。 select QUOTENAME('abc') = '[abc]'

QUOTENAME (Transact-SQL)

动态SQL Server变量从光标错误地解析

1 个答案: