show primary key mysql

Mysql auto-incrementing column leads to duplicate primary key issue analysis..., mysql primary key A few days ago, the development of shoes reported a problem of using the load data infile command to import data primary key conflicts. After analysis,

Set MySQL data table primary key: Use the "PRIMARY key" keyword to create a primary key data column. The primary key column is set to not allow duplicate values, in many cases combined with "auto_increment" incrementing numbers. As shown in the

The recent online frequent occurrence of slave delay, after the detection of the user in the deletion of data, due to the table primary key of the missing primary key, while deleting the condition is not indexed, or delete the condition of the

It is very basic to add or delete a primary key in mysql. The following describes how to add or delete a primary key in mysql. If you are a new user of mysql database, take a look. Modify the mysql Character Set: You can set the mysql character set

The recent occurrence of slave delays on the line is frequent. After the discovery for users in the deletion of data, because the primary key of the table is missing, and delete conditions without index, or delete the conditions of poor filtration,

For MySQL InnoDB table Two-level index whether to join the primary key, summarized as follows: 1 for the MySQL InnoDB table two level index whether to join the primary key, the official also has the explicit explanation, recommends that the

Recently in the collation of things about MySQL, to write down some things to record, in order to query and browse later, the following are some of the operational skills.Add a table fieldALTER TABLE table1 add transactor varchar (ten) not

This article mainly introduces the difference and connection between the primary key and the foreign key in MySQL. it is the basic knowledge in MySQL beginners. if you need it, you can refer to the relationship between the primary key and the

Primary key:A property or property group that uniquely identifies a row in a table. A table can have only one primary key, but there may be multiple candidate indexes. Primary keys often form referential integrity constraints with foreign keys,

It is very basic to add or delete a primary key in mysql. The following describes how to add or delete a primary key in mysql. If you are a new user of mysql database, take a look. Modify the character set of mysql:When installing mysql5.0, you can