SQL Server

SQL2008 expression: Is any combination of constants, variables, columns, or functions, and operators.1. String functionsFunction Name Parameter Example descriptionASCII (string expression)Select ASCII (' ABC ') returns 97Returns the ASCII code of

I. BACKGROUNDSQL Server, what do we usually do if we need to put all of the table data for database A into database B? I will use the import and export function of SSMs, the import and export of table data, it is understandable, such import is very

How SQL Server restores a database if a filegroup is missingI. BACKGROUNDI have a library, because a, b two table data volume is larger, so the table is partitioned; in migrating a library to a new cluster, I only backed up the primary partition of

InstanceMD5 Encryption "123456":Hashbytes (' MD5 ', ' 123456 ')Result: 0xe10adc3949ba59abbe56e057f20f883e (hint: After the end, the result is converted. ）Function Function Describe return value Hashbytes

Stored procedures:SQL Server Stored Procedures Blog Park on an article, explained in very detailed, there are test code, very practical. Execute dynamic SQL statements in SQL Server stored procedures The curse and blessings of the dynamically

Temporary tables in SQL Server are divided into session temporary tables and permanent temporary tables. The session temp table is automatically deleted after the session ends, and the permanent temporary table is basically no different from the

You can use the Replace function in SQL to replace certain characters in a field with the following syntax: Syntax replace (original-string, search-string, replace-string) parameter if one of the arguments is NULL , this function returns NULL.

Original: SQL Server geometry data typeExcerpt from SQL Server 2008 Help The flat spatial data type geometry is implemented as a common language-time (CLR) data type in SQL Server. This type represents the data in the Euclidean (planar) coordinate

In SQL Server, subqueries can be divided into correlated subqueries and unrelated subqueries, but not-in clauses are common for unrelated subqueries, but the not-in clause leads to the following two types of problems: Inaccurate results

C # Connect a SQL Server database connection string, we introduce a parameter (note: The parameters are separated by semicolons):"User Id=sa": The authenticated user name for the connection database is SA. He also has an alias "UID", so this

Ado. NET objects mainly include connection, Command, DataReader, DataAdapter, Dataset,ado. NET access to the database consists of two steps: establishing a database connection, reading or updating data.First, establish a database connectionThe

1. Get all database names:SELECT Name from Master. sysdatabases ORDER by Name2. Get all table names:SELECT Name from DatabaseName. SysObjects Where xtype= ' U ' ORDER by Namextype= ' U ': represents all user tables;xtype= ' S ': denotes all system

Modifying the Windows account password causes SQL Server 2000 to fail to start. --The symptom is a SQL Server 2000 database that is logged on to Windows XP as an administrator or equivalent user. After you modify this Windows account password, SQL

By default, the logged-on user sees themselves in addition to the database for which they have administrative privileges. You can also see other databases, which prompt for no permissions when you click Open. The following settings enable the user

CaseIn the database , Compare the data to 2 different waysThe first way, do not case for any columnSelect Name,case when age>16 then ' adult 'When ageunderage ' end as ' adult 'From StudentIf at the time of judging multiple worth , when ( condition

When doing data migration or replication, it is sometimes necessary to verify the data differences between the target table and the source table. Here are a few ways to verify data differences:1. Two table connection queries, comparing the values of

SQL Server cannot create table as select directlyTo copy a table under SQL Server, think of Oracle under direct CREATE TABLE XXX as SELECT * from .... Can.But the result is wrong, Baidu found.SQL Server syntax is: SELECT * into Tablenew from

Reference article:Http://www.cnblogs.com/knowledgesea/p/3699851.htmlHttp://www.cnblogs.com/moss_tan_jun/archive/2011/11/26/2263988.htmlHttp://www.cnblogs.com/dubing/archive/2011/11/07/2238868.htmlHttp://www.tuicool.com/articles/eAJbEzZThe life cycle

Today, it's been a day.Update the ACCESS library to check the information from the SQL SERVER 2008 repository. I can't find the information but I can do it by myself.First find out how to use the SQL sentenceSELECT * from Restore_base in [Odbc][odbc;

Questions raised by sys. dm_ OS _waiting_tasks of SQL Server Applications (medium ), The previous article introduced the SQL Server application sys. dm_ OS _waiting_tasks raises a question (I) and says sys. dm_exec_requests and sys. dm_ OS