When the MySQL record does not exist, insert. When the record exists, there are basically three solutions to update the internet. First: Example 1: insert multiple records. Suppose There Is A client_id table with the primary key, you can use the
MySQL insert when the record does not exist, update when the record exists, mysqlinsert
There are basically three solutions on the Internet.
First:
Example 1: insert multiple records
Suppose there is a clients table with the primary key of
1. Full backup and incremental backup 1.1 full-scale backupFull-volume data is all the data in the database, and a full backup is the backup of all the data in the database.Back Up all libraries:mysqldump -uroot -p123456 -S /data/3306/mysql.sock -F -
PHP MySQL database common cmd command setshow databases; Display DatabaseCreate database name; Create a databaseUse DatabaseName; Select DatabaseDrop database name deletes databases directly and does not alertShow tables; Show TableDescribe
Insert when MySQL record does not existIn MySQL, inserting (insert) A record is very simple, but some special applications, before inserting the record, need to check whether this record already exists, only if the record does not exist, the insert
MySQL performance tuning and Architecture Design-Chapter 1 Performance Design-MySQL Replication and replication Optimization
Chapter 1 scalability design-MySQL Replication
Preface:
MySQL Replication is a unique feature of MySQL. It can completely
Usage of INSERT, UPDATE, DELETE, and REPLACE statements in MySQL database bitsCN.com
MySQL database insert and update statementsThe SQL statements used to operate databases are generally divided into two types: Query statements, SELECT statements,
This article is a MySQL database insert, UPDATE, delete and replace statements in the use of detailed analysis of the introduction, the need for friends to refer to the
MySQL database insert and UPDATE statements Introduction: The SQL used to
MySQL常用指令,java,php程序员,数据库工程师必备。程序员小冰常用资料整理MySQL common commands (for reference)The most common display commands are:1. Display the list of databases.show databases;2. Display the data table in the library:Use MySQL;Show tables;3, display the
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