SQL Server

/// ///use virtual tables for paged queries that do not apply to queries that explicitly know the column name/// /// SQL such as "SELECT * from name where 1=1"/// page number such as "1"/// the number of bars, such as "/// DataTable Public

1. Calling normal stored procedures(1) Creating a stored procedureCREATE Procedure [dbo]. [Getcontactlistbyname]/* Get contact information by contact name */@Name nvarchar (50)AsBeginSelect Contact.id,contact.name,phone,email,qq,groupname from

write in front of the nonsense : Index This knowledge point, I do not know how many sides to see, the article on the internet a variety of, make me dizzy, make a good point is to test the benefits of the index, but also make a lot of test data out,

Triggers are special stored procedures that run in the database, but cannot invoke triggers by calling names, and triggers are automatically responded to.a trigger is also a transaction, where an error is rolled back .Triggers are divided into DDL

Test environment: Host: Database SQL SERVER08 r2 system Windows Server R2 IP192.168.1.202Cong: Database SQL Server12 system Windows IP192.168.1.100Implementation steps: 1, first on the master-slave machine to add user sqladmin, Password * * * *, and

Classification description of the indexClustered index: Based on the sort and storage location of records within a data table. Because the physical ordering of data can only be one way, only one field in a table can be set as a clustered

SELECTAvg_user_impact as Average_improvement_percentage,Avg_total_user_cost as Average_cost_of_query_without_missing_index,' CREATE INDEX ix_ ' + [statement] +ISNULL (Equality_columns, ' _ ') +ISNULL (Inequality_columns, ' _ ') + ' on ' + [statement]

C # code backs up the database and does not require additional DLLsprotected void Button1_Click (object sender, EventArgs e){///Backup method///SqlConnection conn = new SqlConnection ("server=.; DATABASE=AAAA; User Id=sa; Password=sa; ");SqlCommand

1, the index should be built on the high selectivity of the field (the key value of the number of records/total number of records), the more selective index, the better the effect, the greater the value, the unique index of the highest selectivity;2,

Process Control Statements: BEGIN ... END WAITFOR Goto While IF ... ELSE Break RETURN Continure 1.BEGIN ... ENDBEGIN ... The end statement is used to combine

SQL Server provincial and county level three linkageThree tables recursively merge into a table SQL as follows:Insert into table2 (area_name,area_parent_id)Select Province, ' 0 ' from provincesInsert into table2 (area_name,area_parent_id)Select City,

如果由于外键约束删除table失败，则先删除所有约束：--/1th Step ********** Remove foreign KEY constraints for all tables *************************/ DECLAREC1cursor forSelect 'ALTER TABLE ['+ object_name(parent_obj)+ '] Drop constraint ['+Name+']; ' fromsysobjectswhereXtype=

Practical stored procedures for bank transfers and storage of sequential numbers, and stored procedures for bank transfers Bank Transfer Stored Procedure USE [BankInfor] GOSET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ongoalter procedure [dbo]. [Transfer]

SQL Server Data Summary five methods to easily deal with, SQL Server This article will discuss how to use the GROUPBY clause to summarize data. Use separate column grouping The group by clause sets grouping conditions to summarize data. In the first

SQL Server data is copied to Access in two steps, serveraccess Today, we will focus on the actual operation steps of copying SQL Server data to the Access database, and copying some data from the SQL Server database to the Access database, the main

How to restore SQL server 2000 to accidentally delete data Today, I accidentally deleted more than one thousand pieces of data from the database of the customer, but I didn't back up the data before. It was really depressing. Later I found a tool on

Detailed description of SQL Server2014 hash index principles, server2014 When a key-value pair is passed to a hash function, after calculation by the hash function, according to the results, the key-value pairs will be placed in the appropriate hash

Very useful SQL statements (daily sorting), SQL statements 1./* Get the path and name of the trace file */ SELECT d.VALUE || '/' || LOWER (RTRIM (i.INSTANCE, CHR (0))) || '_ora_' || p.spid || '.trc' trace_file_name FROM (SELECT p.spid

Summary of key features of SQL Server 2016 CTP2.3, 2016ctp2. 3 SQL Server 2016 brings new ground-breaking in-memory performance and analysis functions for key task processing. Comprehensive Security features-Always Encrypted technology helps protect

Detailed description of SQL Server and Oracle paging queries, SQL Server Oracle Whether it is the implementation of the paging query code in DRP or the paging query result in the interview questions, I am prompted that paging query is important.