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When using tables in a database, we often encounter two ways to use tables: using temporary tables and table variables. In actual use, how can we flexibly use them in the stored procedure? Although they implement the same functions, in a stored procedure, how does one sometimes use temporary tables instead of table var
Label: 1 SELECT2TableName =Obj.name,3Totalrows =Prt.rows,4[SpaceUsed (KB)] = SUM (alloc.used_pages) *8
5 From sys.objects obj6JOIN sys.indexes idx on obj.object_id =idx.object_id7JOIN sys.partitions prt on obj.object_id =prt.object_id8JOIN sys.allocation_units alloc on alloc.container_id =prt.partition_id9 WHERETenObj.type ='U'and idx.index_id in (0,1)
One GROUP by Obj.name, Prt.rows AORDER by Totalrows DESC SQL queries the number of record bars for
Label: Reprint Original AddressHttp://www.cnblogs.com/Fooo/archive/2009/08/27/1554769.htmlSELECT (case if A.colorder=1 then d.name Else ' end) Table name, A.colorder field ordinal, a.name field name, when Colum Nproperty (a.id,a.name, ' isidentity ') =1 then ' √ ' Else ' "End", (case when (SELECT count (*) from SYSO
Bjects WHERE (name in (SELECT name from sysindexes WHERE (id = a.id) and (Indid in (SELECT indid F ROM Sysindexkeys WHERE (id = a.id) and (Colid in (S
SQL server often has the following problems:After a table uses columns with automatic numbers, tens of thousands of columns have been automatically numbered due to a large amount of data being tested. Now we are using this table, and the test data has been deleted. The legacy problem is that we are entering new data and the number will only be increased, deleted numbers cannot be used. Who knows how to solv
following syntax:
To change the data type of a column in a table, use the following syntax:
Properties of additions and deletions change:
Fn_listextendedproperty: Gets the extended property, mainly determines if the attribute exists, if it exists, if it does not exist, add
Sp_updateextendedproperty: Update Field description
Sp_addextendedproperty: Adding a field description
Sp_dropextendedproperty: Delete Field d
Multi-threaded SQL statements that do not repeatedly read data from SQL Server tables
When sending text messages or emails, we often use a table to store the data to be sent, multiple threads in the background constantly read the data to be sent from the table and send the data to the History Table after sending the da
= viewX = extended stored procedure when xtype= ' U ' and status>0 represent a table created by the user, the object name is the table name, and the object ID is the ID value of the table (object_id (' table name ')). SELECT * fromwyl_db. dbo.sysobjects where xtype= ' U ' and status>0 can list all the user-created table names in the library wyl_db .Third, syscolumns:Each column in the table and view occu
First, table variablesTable variables were first introduced in SQL Server 2000. The specific definitions of table variables include column definitions, column names, data types, and constraints. Constraints that can be used in table variables include primary KEY constraints, UNIQUE constraints, NULL constraints, and CH
/*Department parentdept departmanage Rank--------------- -------------------- ----------------------- -----------Technical Department general manager Tom 0Program Group Technical Department GiGi 1Design Group Technical Department Yoyo 1Special Group program group Yue 2*/ --Query department manager is Gigi's superior department name; with HgO as(SELECT *,0 as rank from #EnterPrise where departmanage= ' GiGi 'UNION ALLSelect h.*,h1.rank+1 from #EnterPrise H joins HgO H1 on H.department=h1. Parent
---SQL SERVER 2000 Calendar Parent-child relationship tables (binary tree) get all parent nodes and node layer functions for all child nodes---geovin Du tu ju wen--Building a test environmentCreate Table Geovindu([ID] Int,Fatherid Int,[Name] Varchar (10))Insert A Select 1, 0
SQL UNION operator
The UNION operator is used to merge the result sets of two or more SELECT statements.
Note that the SELECT statement within the UNION must have the same number of columns. The column must also have a similar data type . Also, the order of the columns in each SELECT statement must be the same.
SQL UNION SyntaxSELECT column_name (s) from table
The T-SQL statement that deletes the table is:DROP table Drop is discarded, and drop table means that a table is completely erased.There are two ways to delete table data: Delete and truncate.The use of delete is as follows:Delete from The usage of truncate is as follows:TRUNCATE TABLE The difference between delete and truncate is as follows:1. Delete can delete one or more data from a table, or delete all
For the first time, SQL Server appeared on the top ten rankings of "all environments" (This ranking includes all databases running in Microsoft Windows and non-Windows environments ), this indicates that SQL Server has ranked amon
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Yesterday I encountered an SQL Server problem: I need to write a stored procedure to process data in several tables. The problem is that I want to splice multiple rows in one column of a table into one row, for example, a table has two columns of d
Tags: sys http alt compute VIA--mount Ges StudioThe computed column differs from the column that requires us to assign the value manually or by the program, whose value is derived from the computed value of the other columns in the table. For example, if a table contains a quantity column number and a price column, we
, DatabaseName represents the data name, and filename indicates the file name:ALTER DATABASE [DataBaseName] REMOVE FILE FileName;2. File group deletion:When the file group file is deleted, as normal understanding, you should be able to delete the filegroup directly, it is not practical, you can not delete filegroups.Because there are a few things that depend on filegroups, one is a partitioning scheme, and the other is a partitioned table that uses the partitioning scheme.Therefore, to delete a
What is a self-increment columnThe ID column can be set to self-increment in SQL Server. That is, you do not need to specify a value for the ID, the column is automatically assigned a value by SQL Server, and the value of each new
to the corresponding table query, do not care too much.Is all this tempting?Yes, then we can start creating a partitioned table.First, the first step in creating a partitioned table is to create a database filegroup, but this step can be omitted because you can use the primary file directly. But I personally think that, in order to facilitate management, you can create several filegroups, so that different small
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