periscope sql

T-SQL query advanced-understanding the lock introduction in SQL Server, each query will find the shortest path to achieve their goals. If the database only accepts one connection, only one query is executed at a time. Therefore, queries must be completed quickly and easily. However, most databases need to process multiple queries at the same time. T-SQL query adv

SQL basics 1: SQL Basics 1. What is SQL? SQL is a structured query language. SQL enables us to access databases SQL is an ANSI standard computer language. Ii. What can SQL do?

password' Bulk insert database name... table nameFrom 'C: \ test.txt'With (Fieldterminator = ';',Rowterminator = '\ N') --/* Dbase iv FileSelect * fromOpenRowSet ('Microsoft. Jet. oledb.4.0', 'Dbase IV; HDR = no; IMEX = 2; database = c: \ ', 'select * from [customer profile 4.dbf]')--*/ --/* Dbase iii FileSelect * fromOpenRowSet ('Microsoft. Jet. oledb.4.0', 'Dbase III; HDR = no; IMEX = 2; database = c: \ ', 'select * from [customer profile 3.dbf]')--*/ --/* FoxPro DatabaseSe

SQL Server data is currently present on the corporate server and needs to be migrated to SQL AzureThere are two types of migration Database structure replication Database structure replication and data migration to SQL Azure The 1th approach is to create a new library from an existing database to a new server by generating a structure script on

1. view the database version Select @ version 2. view the operating system parameters of the machine where the database is locatedExec master .. xp_msver 3. view database startup parametersSp_configure 4. view the database startup timeSelect convert (varchar (30), login_time, 120) from Master .. sysprocesses where spid = 1 View database server name and Instance namePrint 'server name ...... + convert (varchar (30), @ servername)Print 'instance ......: '+ convert (varchar (30), @ servicename)5.

1. View the version of the database SELECT @ @version 2. View the machine operating system parameters of the database EXEC master.. xp_msver 3. View Database Startup Parameters sp_configure 4. View Database Startup time Select CONVERT (varchar, login_time,120) from master. sysprocesses where spid=1 To view the database server name and instance name print ' Server Name ... ...: ' + CONVERT (varchar (), @ @SERVERNAME), ". print ' Instance ....: ' + CONVERT (varchar), @ @SERVICENAME. @)., d.. 5

Performance Comparison of dynamic SQL, bind variables, and static SQL 1 the three stored procedures in the test example use three programming methods: dynamic SQL, bind variable, and static SQL. The specific content of the stored procedure is as follows: l dynamic SQL create

SQL Server, db2, and oracle Stored Procedure dynamic SQL statement example Oracle Create or replace procedure a_testAS t_ SQL VARCHAR2 (2000); t_a VARCHAR2 (20); t_ B VARCHAR2 (20); t_c VARCHAR2 (20); t_d VARCHAR2 (20); BEGIN t_c: = 'F'; t_d: = 'G'; -- any SQL statements such as insert can be used here. t_

Example of SQL injection vulnerability in php: SQL injection vulnerability repair. When developing a website, for security reasons, you need to filter the characters passed from the page. Generally, you can use the following interface to call the database content: URL address bar, login field when developing a website, out of security considerations, you need to filter the characters passed from the page. G

* Description: copy a table (only copy structure, source table name: a new table name: B)Select * into B from a where 1 * Description: copy a table (copy data, source table name: A target table name: B)Insert into B (a, B, c) Select D, E, F from B; * Description: displays the article, Submitter, and last reply time.Select a. Title, A. username, B. adddate from Table A, (select max (adddate) adddate from table where table. Title = A. Title) B * Description: External join query (table name 1: Tab

SQL statement Import and Export /****** Export to excelExec master.. xp_mongoshell 'bcp settledb. DBO. shanghu out C:/temp1.xls-C-Q-s "gnetdata/gnetdata"-U "sa"-P ""' /*********** Import ExcelSelect *From OpenDataSource ('Microsoft. Jet. oledb.4.0 ','Data source = "C:/test.xls"; user id = admin; Password =; extended properties = Excel 5.0 ')... xactions Select cast (subject number as numeric (255) as nvarchar () + ''converted aliasFrom OpenDataSource

The following statements are Mssql statements and cannot be used in access. SQL classification:DDL-Data Definition Language (CREATE, ALTER, DROP, DECLARE)DML-data manipulation language (SELECT, DELETE, UPDATE, INSERT)DCL-Data Control Language (GRANT, REVOKE, COMMIT, ROLLBACK)First, we will briefly introduce the basic statements:1. Description: Create a databaseCreate database database-name2. Description: delete a database.Drop database dbname3. Descr

SQL server, db2, oracle Stored Procedure dynamic SQL statement example, db2oracle Oracle Create or replace procedure a_testAS t_ SQL VARCHAR2 (2000); t_a VARCHAR2 (20); t_ B VARCHAR2 (20); t_c VARCHAR2 (20); t_d VARCHAR2 (20); BEGIN t_c: = 'F'; t_d: = 'G'; -- any SQL statements such as insert can be used here. t_