sql query analyzer online

Label:SQL Server Enterprise Edition is supported for online index rebuilds. So how does an online index rebuild work and how does it affect our queries?Since it is online, SQL Server keeps the existing index available to the user, which means that it does not modify the existing index and its associated statistics. The

most complex, but also the focus of tuning. At present, the application of database is divided into two types of online transaction processing (oltp,online Transaction processing) and decision support System (Dss,decision Support System), which have different requirements for query. OLTP mainly involves a single table, simple

exist, output information 2 is shown, and the message "file not found" is displayed ".However, when the path contains spaces, such as C:/program files, directly use exec master .. xp_cmdshell 'dir C:/program files ', the system returns the same result as shown in Figure 2. We need to perform additional processing to get the correct returned result:　　(1) exec master .. xp_mongoshell 'dir "C:/program files/Microsoft SQL Server/MSSQL "'This method can b

SQL statement join Table query and SQL statement join query Answers to questions about SQL statement join Table query 1. Create two databases: Database A (table a) and database B (table B ). 2. allocate the same account permissi

statement,execution in Query Analyzer------------------------------------------------------------------------several issues used by log Explorer----------------------------------------------------------------------1) Make a full/differential databaseLog Backup Backup If you choose to delete the inactive entries in the transaction log and then use Log Explorer to try to read the log, you are prompted no log

A slow query event caused by misjudgment of the online mysql optimizer. mysql misjudgment Preface: After receiving the crazy slow query and request timeout alarm, metrics analyzes the exception of the mysql request. cli-> show proceslist shows many slow queries. This SQL statement is not available in the past. This pro

|| slow_query_log_file | /mysqllog/slow_log/slow_queries_3306_new.log |+---------------------+----------------------------------------------+4 rows in set (0.00 sec) 5. check the slow SQL in the new slow log file. mysql> select sleep(10) as a, 1 as b;+---+---+| a | b |+---+---+| 0 | 1 |+---+---+1 row in set (10.00 sec)mysql>[mysql@xxx-xxx ~]$ more /mysqllog/slow_log/slow_queries_3306_new.log......Time Id Command Argument# Time: 140213 6:44:24# User@H

To analyze the performance of a query, you can view {Tagshow (event, '% D6 % B4 % D0 % D0 % BC % C6 % BB % AE ');} "Href =" javascript:; "target =" _ Self ">Execution Plan. Execution Plan description {Tagshow (event, 'SQL ');} "Href =" javascript:; "target =" _ Self ">SQL{Tagshow (event, 'server ');} "Href =" javascript:; "target =" _ Self ">ServerHow the

SQLServer how to use the T-SQL command to query a database in which tables, convenient table operations, need friends can refer to the next SQLServer how to use the T-SQL command to query a database in which tables, convenient table operations, need friends can refer to the next 1.

); +------+------+--------+------+------+--------------------+ | num | d_id | name | Age | sex | homeaddr | +------+------+--------+------+------+--------------------+ | 1 | 1001 | Zhang San | 26 | Beijing hai Ding District | +------+------+--------+------+------+--------------------+ 1 row in Set (0.00 sec) mysql> 2.4 Sub-query with any keyword The Any keyword means that any of these conditions are met, and when the Any

1. Query all tables in sql: Select table_name from database name. Information_schema. Tables Where table_type= ' BASE table ' is executed, you can see the names of all the tables in the database that belong to you 2. Query all tables and columns in sql:Select Dbo.sysobjects.name as TABLE_NAME, dbo.syscolumns.name as column_name from Dbo.syscolumns INNER JOIN

From: http://www.cnblogs.com/huacn/archive/2007/04/28/ SQL _Prompt_3.html A good SQL query analyzer auxiliary tool found yesterday. SQL prompt 3 is not cracked, and it seems to be a 15-day trial.Its main function is to automatically detect the

I wrote a half-day SQL statement in the query analyzer and forgot to save it ~ What should I do if I want to retrieve an SQL statement that has been executed for a certain period of time? I wrote a half-day SQL statement in the query