if exists

 MySQL's dos command line DaquanTags: dos command line2016-11-04 16:03 509 people read comments (0) favorite reports Classification:DOS command line (5)MySQL (1)Directory (?) [+]1, connect MySQL (Chinese garbled at the end of the article) format:

Format: mysql-h host address-u user name-P user Password1. Connect to MySQL on this machine. First open the DOS window, then enter the directory Mysql\bin, and then type the command Mysql-u root-p, enter after the prompt you to lose the password.

1, Connection MySQL format: mysql-h host address-u user name-P user Password1. Connect to MySQL on this machine. First open the DOS window, then enter the directory Mysql\bin, and then type the command Mysql-u root-p, enter after the prompt you to

1 determine if the database exists if exists (SELECT * from sys.databases WHERE name = ' database name ') drop database [DB name]2 Determine if the table exists if exists (SELECT * from sysobjects where id = object_id (n ' [table name] ') and

1, Connection MySQL format: mysql-h host address-u user name-P user Password1. Connect to MySQL on this machine. First open the DOS window, then enter the directory Mysql\bin, and then type the command Mysql-u root-p, enter after the prompt you to

1, Connection MySQL format: mysql-h host address-u user name-P user Password1. Connect to MySQL on this machine. First open the DOS window, then enter the directory Mysql\bin, and then type the command Mysql-u root-p, enter after the prompt you to

1, Connection MySQL format: mysql-h host address-u user name-P user Password1. Connect to MySQL on this machine. First open the DOS window, then enter the directory Mysql\bin, and then type the command Mysql-u root-p, enter after the prompt you to

We've introduced the knowledge points of spring cloud and oauth2 in the previous few, and today we're going to use spring cloud and oauth2 to build Commonservice-sso services, In this section we are just building Commonservice-sso foundation

What is a storage routine?A stored routine is a set of SQL statements stored in a database tutorial server that is invoked by invoking a specified name in a query. Line these SQL statement commands.Why should I use a stored procedure?We all know

Ix. Degradation DimensionsThis section discusses a technique called a degenerate dimension. This technology reduces the number of dimensions and simplifies the dimension Data Warehouse model. Simple patterns are easier to understand than complex and

One, the connection databaseFormat: mysql-h host address-u user name-P user Password 1.1. Connect to MySQL on this computer. first open the DOS window, and then enter the directory Mysql\bin, and then type the command Mysql-u root-p, after the

MyBatis is an excellent persistence layer framework that supports common SQL queries, stored procedures, and advanced mappings. MyBatis eliminates the manual setting of almost all JDBC code and parameters and the retrieval encapsulation of the

Program | data | Database Frog Frog recommended: How to do an efficient ASP database operating procedures In general, we do ASP database programs are ado+access, and are using some query string plus recordset to manipulate the database, up to only

Control In a project, you often define different project-level users and permissions, and, following the control of Windows role/user/access right, my implementation is as follows: 1, in the database to establish 5 tables: Tsvrole, Tsvuser,

Creating User: Create user ' username ' [@ ' host name '] identified by ' Password ';The hostname can be empty, and the default is the% permission, which means that all hosts can connect. create USER ' jredu ' @ ' loaclhost ' identified by ' jredu '

1, first check whether the function function is open: Show variables like '%func% ';If not enabled: SET GLOBAL Log_bin_trust_function_creators=1;The closure is: SET GLOBAL log_bin_trust_function_creators=0;2. Custom functions:Delimiter $$;This

MySQL Common Command Daquan1. mysql: Connect to the databaseMySQL commands the user to connect to the database. MySQL command format: mysql-h host address-u user name-P user Password1) Connect to MYSQL on this computer first open the DOS window,

ObjectiveIn this section we talk about the most common situation in concurrency is updated, if there is no row record in the concurrency inserted, at this time is not processed very easy to insert duplicate key situation, this article we describe

In the object-oriented programming field, classes and classes have an inheritance relationship. For example, in the Java World, only the extends keyword is required to determine the parent-child relationship of these two classes, however, in the

-- ===================================================== ====== -- Author: shipeng. wang -- Create date: 2010-12-31 -- Description: automatically generates the add, delete, and modify parameters stored procedure and call code based on the table name.