pivot table sql server

Label:We all know that when the amount of database data is large, data can be horizontally extended, such as sub-Library, partition, sub-table (also called partition) and so on. One scenario for a sub-table is to use the partitioned view implementation. Partitioned views allow data in large tables to be split into smaller member tables. partitions data between individual member tables based on the range of

then we can break down each point of the key.Partitioning is to split a table data into sub-collections, that is, to split a data file into multiple data files, but the storage of these files can rely on a filegroup or multiple filegroups, because more than one filegroup can increase the database access concurrency, but also can be different partitions configured to different disks to improve efficiency , the recommended partition is created with the

, Chinese name)Select @sql = @sql + Case when Number = 1 Then '); --Drop Table'+Table name+'; CREATE TABLE'+Table name+' ( ' Else "' End + ( Case when Number = 1 Then ' ['+Englis

We all know that many database software provide the automatic numbering function for tables, which is very useful for some table functions and can reduce unnecessary work, I recently used SQL Server, So I encountered some problems in this process, but after searching for information and exploration, I have finally solved them. So I will write down my own experien

SQL Server uses triggers to update multi-table views. The procedure is to use the update trigger to generate two virtual tables "inserted" to store the modified data information and the "deleted" table, then, update the corresponding data to the field information in the corresponding data

In SQL Server 2005 or later versions, the APPLY table operation is added, which greatly facilitates our daily queries. 　　The new APPLY table operator applies the right table expression to each row in the left table expression. Unl

6.3 insert XML data into the SQL Server database table. We can use the OPENXML FUNCTION IN THE SYSTEM Stored Procedure sp_xml_preparedocument to insert the data in the XML document to the database. The system stored procedure sp_xml_preparedocument is used to create an internal representation of the XML document that can be inserted into the database. This stored

If exists (select * From tempdb .. sysobjects where id = object_id ('tempdb .. # temp ')) Drop table # temp Temporary table You can create local and global temporary tables. The local temporary table is only visible in the current session; the global temporary table is visible in all sessions. The name of the local

If exists (select * from tempdb .. sysobjects where id = object_id ('tempdb .. # temp '))Drop table # tempTemporary table You can create local and global temporary tables. The local temporary table is only visible in the current session; the global temporary table is visible in all sessions.The name of the local tempor

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 variables, and sometimes use table variables ins

I develop C # winform myself. Recently came into contact with a task. Generate a script to create the table based on an existing table in SQL. First, we want to solve the problem from the perspective of stored procedures. I read some documents on the Internet and found that MSSQL itself does not have this function. I need to write it myself. Other databas

The step is to use the 2 virtual table "inserted" generated by the update action trigger to store the modified data information and the "deleted" table, and then update the corresponding data to the field information in the corresponding datasheet; 1. Create 3 Tables First: A. Information table: Use [Sql-li

Tags: complete delete sys how to use SSI current CTI ServerIn addition to the basics of table triggers, this article also uses a bit of knowledge.1. How to use SQL to get the current session user name and machine nameSelect current_user, HOST_NAME ()2. How to get the current table name in a table triggerSELECT Object_s

Lock a table in the database SELECT * FROM table WITH (HOLDLOCK) Note: What is the difference between locking a database table? SELECT * FROM table WITH (HOLDLOCK) Other transactions can read tables, but cannot update or Delete tables. SELECT * FROM table WITH (TABLOCKX) Ot