我的 tsql 需要一些帮助,我了解 sql,但主要只是查询表,我发现 tsql 和循环很难完成。我的 IF 语句遇到了症结所在。如您所见,我已经编写了循环并尝试了一些调试,并且到目前为止代码是正确的。
在 Else 部分中,我需要检查它是否是第一次使用 @firstloop 通过循环,然后复制所有数据,这主要是我遇到问题的循环,并且可以帮助获得起点。
我正在使用游标,但被告知它不会影响性能,因为它没有做太多工作,我将不胜感激有关问题的任何帮助。我还被告知某些部分是硬编码的,例如 Production2 应该是 @Source_Database_Name .
declare @Source_Database_Name varchar(255) = 'Production2';
declare @Destination_Database_Name varchar(255) = 'c365online_script1';
declare @Company_Id int = 1 --declare a companyid
CREATE TABLE #CompanyID (ID bigint)
INSERT INTO #CompanyID(ID)
VALUES('15')
--FIRST CURSOR LOOP THROUGH THIS TABLE
CREATE TABLE #TableList (
processorder int,
tablename NVARCHAR(100)
)
INSERT INTO #TableList (processorder, tablename )
VALUES
(1, 'tProperty');
DECLARE @firstLoop BIT
--SET @firstLoop = true
DECLARE @Counter INT -- counting variable
----------- Cursor specific code starts here ------------
-- company cursor
declare copyCompanyDataCursor CURSOR fast_forward FOR
SELECT ID from #CompanyID;
open copyCompanyDataCursor
fetch next from copyCompanyDataCursor into @Company_Id;
WHILE @@FETCH_STATUS = 0
BEGIN
declare @processorder int;
declare @tablename varchar(500);
-- table cursor
declare copyTableDataCursor CURSOR fast_forward FOR
SELECT processorder,tablename from #TableList order by processorder;
open copyTableDataCursor
fetch next from copyTableDataCursor into @processorder, @tablename;
while @@FETCH_STATUS = 0
BEGIN
SET IDENTITY_INSERT [c365online_script1].[dbo].[tCompany] ON
-- Does the table have a companyID column? if statement checking for company id
IF EXISTS(SELECT * FROM Production2.INFORMATION_SCHEMA.COLUMNS
WHERE COLUMN_NAME='CompanyID' and TABLE_NAME=@tablename)
BEGIN
declare @debug varchar(max)
SET @debug = 'INSERT INTO ' + @Destination_Database_Name + '.dbo.' + @tablename + ' SELECT * FROM ' + @Source_Database_Name + '.dbo.' + @tablename + ' WHERE ' + @Source_Database_Name + '.dbo.' + @tablename + '.CompanyID = ' + CAST(@Company_Id as varchar(10))
print @debug
--EXEC(@debug)
--EXEC('INSERT INTO ' + @Destination_Database_Name + '.dbo.' + @tablename + ' SELECT * FROM ' + @Source_Database_Name + '.dbo.' + @tablename + ' WHERE ' + @Source_Database_Name + '.dbo.' + @tablename + '.CompanyID = ' + @Company_Id )
END
ELSE
-- if no check if this is the first time through company loop and copy all data- if @firstloop company exists look at information schema
BEGIN
Print 'No'
END
-- if yes then copy data based on companyID in cursor
--EXEC('INSERT INTO ' + @Destination_Database_Name + '.dbo.' + @tablename + ' SELECT * FROM ' + @Source_Database_Name + '.dbo.' + @tablename )
-- company logic
SET IDENTITY_INSERT [c365online_script1].[dbo].[tCompany] OFF
FETCH NEXT FROM copyTableDataCursor into @processorder,@tablename;
END
close copyTableDataCursor;
Deallocate copyTableDataCursor;