table-variable

How to see the values of a table variable at debug time in T-SQL?

由 不问归期 提交于 2019-11-27 05:54:59
Can we see the values (rows and cells) in a table valued variable in SQL Server Management Studio (SSMS) during debug time? If yes, how? That's not yet implemented according this Microsoft Connect link: Microsoft Connect kirby DECLARE @v XML = (SELECT * FROM <tablename> FOR XML AUTO) Insert the above statement at the point where you want to view the table's contents. The table's contents will be rendered as XML in the locals window, or you can add @v to the watches window. This project https://github.com/FilipDeVos/sp_select has a stored procedure sp_select which allows for selecting from a

Can I loop through a table variable in T-SQL?

由 梦想与她 提交于 2019-11-27 05:01:42
问题 Is there anyway to loop through a table variable in T-SQL? DECLARE @table1 TABLE ( col1 int ) INSERT into @table1 SELECT col1 FROM table2 I use cursors as well, but cursors seem less flexible than table variables. DECLARE cursor1 CURSOR FOR SELECT col1 FROM table2 OPEN cursor1 FETCH NEXT FROM cursor1 I would like to be able to use a table variable in the same manner as a cursor. That way I could execute some query on the table variable in one part of the procedure, and then later execute some

How can I reseed an identity column in a T-SQL table variable?

由 喜欢而已 提交于 2019-11-27 01:15:35
问题 I have a T-SQL table variable (not a table) which has an auto incrementing identity column. I want to clear all data from this variable and reset the identity column value to 1. How can this be done? 回答1: If you're using a table variable, you can't do it. If it were a table, you could truncate it or use DBCC CHECKIDENT . But, if you have to use a table variable, you have to use something other than an identity column. Or, more accurately, use the identity column in your table variable but

PostgreSQL table variable

由 一笑奈何 提交于 2019-11-26 23:03:02
问题 Is there anything like table variables in T-SQL? In Sql Server it looks like this: DECLARE @ProductTotals TABLE ( ProductID int, Revenue money ) Then in procedure I can: INSERT INTO @ProductTotals (ProductID, Revenue) SELECT ProductID, SUM(UnitPrice * Quantity) FROM [Order Details] GROUP BY ProductID And manipulate with this variable like an ordinary table. Here is description: http://odetocode.com/Articles/365.aspx 回答1: As @Clodoaldo commented: use a temporary table in PostgreSQL. For your

How to fix “Must declare the scalar variable” error when referencing table variable?

由 独自空忆成欢 提交于 2019-11-26 21:07:58
问题 I can't figure out why (or maybe you just can't do this) I get the out of scope error Must declare the scalar variable "@CompanyGroupSites_Master. So is it that I cannot access my Table variable this way inside my Cursor, or I must have missed something simple that's keeping that table variable out of scope when referencing from within the cursor body? DECLARE @TotalCompaniesToProcess int SET @TotalCompaniesToProcess = (select distinct Count(BusinessLine) from vwBuisinessUnit) IF(

How to see the values of a table variable at debug time in T-SQL?

由 大城市里の小女人 提交于 2019-11-26 10:07:14
问题 Can we see the values (rows and cells) in a table valued variable in SQL Server Management Studio (SSMS) during debug time? If yes, how? 回答1: That's not yet implemented according this Microsoft Connect link: Microsoft Connect 回答2: DECLARE @v XML = (SELECT * FROM <tablename> FOR XML AUTO) Insert the above statement at the point where you want to view the table's contents. The table's contents will be rendered as XML in the locals window, or you can add @v to the watches window. 回答3: This

Creating an index on a table variable

由 ＊爱你＆永不变心＊ 提交于 2019-11-26 06:20:43
Can you create a index on a table variable in SQL Server 2000 ? i.e. DECLARE @TEMPTABLE TABLE ( [ID] [int] NOT NULL PRIMARY KEY ,[Name] [nvarchar] (255) COLLATE DATABASE_DEFAULT NULL ) Can I create a index on Name? The question is tagged SQL Server 2000 but for the benefit of people developing on the latest version I'll address that first. SQL Server 2014 In addition to the methods of adding constraint based indexes discussed below SQL Server 2014 also allows non unique indexes to be specified directly with inline syntax on table variable declarations. Example syntax for that is below. /*SQL

Creating an index on a table variable

由 自古美人都是妖i 提交于 2019-11-26 01:57:07
问题 Can you create a index on a table variable in SQL Server 2000 ? i.e. DECLARE @TEMPTABLE TABLE ( [ID] [int] NOT NULL PRIMARY KEY ,[Name] [nvarchar] (255) COLLATE DATABASE_DEFAULT NULL ) Can I create a index on Name? 回答1: The question is tagged SQL Server 2000 but for the benefit of people developing on the latest version I'll address that first. SQL Server 2014 In addition to the methods of adding constraint based indexes discussed below SQL Server 2014 also allows non unique indexes to be

When should I use a table variable vs temporary table in sql server?

由 社会主义新天地 提交于 2019-11-26 00:29:41
问题 I\'m learning more details in table variable. It says that temp tables are always on disk, and table variables are in memory, that is to say, the performance of table variable is better than temp table because table variable uses less IO operations than temp table. But sometimes, if there are too many records in a table variable that can not be contained in memory, the table variable will be put on disk like the temp table. But I don\'t know what the \"too many records\" is. 100,000 records?

What&#39;s the difference between a temp table and table variable in SQL Server?

由 久未见 提交于 2019-11-26 00:06:23
问题 In SQL Server 2005, we can create temp tables one of two ways: declare @tmp table (Col1 int, Col2 int); or create table #tmp (Col1 int, Col2 int); What are the differences between these two? I have read conflicting opinions on whether @tmp still uses tempdb, or if everything happens in memory. In which scenarios does one out-perform the other? 回答1: There are a few differences between Temporary Tables (#tmp) and Table Variables (@tmp), although using tempdb isn't one of them, as spelt out in
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