SQL Server

There is often a need to back up the database regularly. Scheduled backup to the local, or is quite easy, the scheduled task can be completed, but if the machine is hung, the backup to the machine is meaningless, then need to consider the backup to

Most SQL Server tables require an index to increase the speed of data access, and if there is no index, SQL Server will be able to scan every record in the table to find the requested data. Indexes can be divided into clustered and non-clustered

For the first time in a recent SQL Server write trigger, there is a difference between SQL and Oracle triggers, the biggest difference:(1) SQL only statement-level trigger, no row-level triggering;(2) Oracle has statement-level triggering and

Today, when you execute such a statement:SELECT Store-freez as less from ' products ';The following error is reported:Data Truncation:bigint UNSIGNED value is out of range in ' (' Products '. ' Store ' – ' products '. ' Freez ') 'After a search on

Functions commonly used to intercept strings in SQL Server: 1. Left(character_expression, integer_expression) Function Description:Left ( ' source string ', ' to intercept the leftmost number of characters ') Returns the specified number

First, create a database with a login form. Student Table Curriculum Schedule table1. Query the sname, Ssex, and class columns of all records in the student table.2, the inquiry teacher all units namely does not duplicate depart column.3. Query all

Tools to use: Sql server Java MyBatis First step: Create a function to get the data in the XMLCREATE function create_table (@str XML) returns @tb table (SourceID varchar) asbegin INSERT INTO @tb SELECT

First, the experimental environmentOperating system: Windows Server 2008Database: SQL Server R2Second, the specific steps:1. Open SQL Server Management Studio and log in as Windows authentication, such as:2. Under Object Explorer, right-click

CREATE TRIGGER Ic_deploy_snp_triggerOn Ic_deployFor Insert,updateAsBEGINDECLARE @LocalOrgCode CHAR (3);DECLARE @OutOrgCode char (3);DECLARE @InOrgCode char (3);DECLARE @OrderType SMALLINT;DECLARE @SPARE2 int;IF EXISTS (select 1 from inserted) and

Many people know that there is a merge key in Oracle, and SQL Server actually supports merge from version 2008.The update, Insert, and delete operations can also be done in a SQL sentence in the same way as Oracle.Here is a simple example of a

create function Fn_find (@find varchar (8000), @str varchar (8000), @n smallint) ret Urns int as BEGIN if @n 0 and @count 　　SQL Server finds the location of the specified string

ACID Atomicity (atomicity), atomicity means that transactions in a database are executed as atoms. That is, the entire statement is either executed or not executed. Consistency (consistency), consistency, that is, the integrity

Package demosql;Import java.sql.*;public class Test {Static final String DRIVER = "Com.microsoft.sqlserver.jdbc.SQLServerDriver";Static final String URL = "Jdbc:sqlserver://localhost:1433;databasename=test";Static final String USER = "Su";Static

1. DBCC ShowcontigDisplays fragmentation information for the data and indexes of the specified table. When you make a large number of modifications to a table or add data, execute this statement to view fragmentation information for the specified

For example, we have such a table, the table name is table1, the table is stored in a class of students all the subjects of the test results, assuming the following: Name Subjects Scores John doe

Understand clustered indexes in SQL Server, When it comes to clustered indexes, I think every programmer can understand it, but there are also many growth programmers like me who can only use rote memorization to solve this problem. What table can

View introduction in SQL Server 1): view definition A view is a virtual table defined by a query based on one or more tables. It stores the specific definition of the query, and the view does not contain any data. A view is essentially different

The method for exporting data to XML and Json in SQL Server, xmljson Sometimes it is necessary to export data from SQL Server to other departments at a time for association or analysis. This requirement is of course very simple for SSIS, however, in

Required SQL statement (8) integrity constraints of the database and SQL integrity Entity integrity1. Define the primary key when creating a table Create table Name(Sno int identity (1, 1 ),Sname nvarchar (20 ),-- Set the primary keyPrimary key (Sno)

Share data exported as XML and Json in SQL Server, xmljson Sometimes it is necessary to export data from SQL Server to other departments at a time for association or analysis. This requirement is of course very simple for SSIS, however, in many