mysql insert ignore

Speaking of mysql, we immediately think of its small size, fast speed, and open source features, so it is widely used. Today, we will summarize the two most frequent mysql operations: insert and query, and the optimization methods. Insert: I. Text Import Using load data infile to download DATA from text is 20 times fa

The syntax of the insert Copy Code code as follows: INSERT [Low_priority | Delayed | High_priority] [IGNORE] [Into] tbl_name [(Col_name,...)] VALUES ({expr | DEFAULT},...), (...),... [on DUPLICATE KEY UPDATE col_name=expr, ...] Or: INSERT [Low_priority | Delayed | High_priority] [

The following article describes the update statements of the MySQL database in detail. We will introduce the INSERT and REPLACE statements to you today, we all know that the syntax of these two statements is very similar. The main difference between them is how to process repeated data. The SQL statements used to operate MySQL databases are generally divided into

replication server because delayed does not produce data that is not the same as the primary server on the secondary server. Note that the rows currently in the queue are only in storage until they are inserted into the table. This means that if you forcibly abort the mysqld (for example, using kill-9) Or if mysqld stops unexpectedly, all rows that are not written to the disk will be lost. second, the use of ignore

Base class for batch data insertion in mysql, mysql insert You have designed a mysql database to add data base classes in batches. It is used to add data to the mysql database in batches. sub-classes are easy to implement and the self-testing performance is also good. 1. bas

When you use the mysql database to insert data, the question mark (?) appears (?) Problem, solution, mysql question mark First, the mysql database I use is 5.7.12. Problems: 1. Data insertion error. insertion failed. The following error occurs: Incorrect string value: '\ xCD \ xF5 \ xD5 \ xBC \ xBE \ xa9' for column

Tags: http io ar os using SP on Data 2014For some systems with large data volume, the problem of database is not only inefficient, but also the data storage time is long. Especially like a reporting system, the time spent on data import every day can be as long as a few hours or more than 10 hours. Therefore, it makes sense to optimize database insert performance.After some performance tests on MySQL InnoDB

same as the primary server in the secondary server. Note that the rows currently in the queue are only saved in memory until they are inserted into the table. This means that if you forcibly abort the mysqld (for example, using kill-9)Or if mysqld stops unexpectedly, all rows that are not written to the disk will be lost.Second, IGNORE the Use Ignore is an extension of

When MySQL creates a table, it sets the TIME field to automatically insert the current time droptableifexists 'content'; CREATETABLE 'content' ('id' char (20) NOTNULL, 'current _ time' timestampnotnulldefacucur When MySQL creates a table, it sets the time field to automatically insert the current time. Drop table

Label:Transferred from: Http://blog.163.com/[email protected]/blog/static/173131045201222122732435/In MySQL, insert into and replace into and insert ignore usage differences:Three commonly used statements for inserting data in MySQL:Insert into indicates the data is inserted, the database will check the primary key, if

This article is a detailed analysis of the use of the MySQL database insert, UPDATE, delete, and replace statements, the need for a friend referenceMySQL database insert and UPDATE statementsCitation: SQL used to manipulate the database is generally divided into two types, one is the query statement, which is what we call the SELECT statement, the other is the UP

MySqlinsert insert operations do not completely refer to North bitsCN.com MySql insert operations are not completely North-pointed 1. the inserted data is from other tables. Table A has the id and cola fields. Table B has fields such as id, cola, colb..., where id is the primary key and cola is the column with the same name. To

Label:Started thinking that, like SQL Server, using not exists to judge, the result is not: IF not EXISTS(SELECT 1 fromVrv_paw_templateWHERETemplateName='Custom' ORTemplatefilename='Policycustom'LIMIT1) INSERT intoVrv_paw_template (Templatename,templatefilename,createtime,updatetime)VALUES('Custom','Policycustom', now (), now ()); END IF The correct wording: INSERT intovrv_paw_template (templatename,tem

MySQL stored procedures insert data in cycles bitsCN.com when testing machines, the absolute values of inset and alert are often tested, so a stored procedure is written to complete. Drop procedure if exists proc_buildata; Tudou @ Gyyx Create procedure proc_buildata (IN loop_times INT) BEGIN DECLARE var int default 0; Prepare msql from 'create table if not exists 'employee' ('id' int (10) unsign

executeBecause the database table is a fixed prefix plus the current date form, so whether to create a table or write data is based on dynamic tables, so you can not write to the same fixed table as the simple INSERT statement, in addition, the parameter ID passed to the stored procedure is not directly passed to the stored insert statement, will report the SQL statement error, so need to introduce local p

Label:MySQL Bulk SQL Insert performance optimizationsPosted by Kiki TitaniumOn December 7, 2012 For some systems with large data volume, the problem of database is not only inefficient, but also the data storage time is long. Especially like a reporting system, the time spent on data import every day can be as long as a few hours or more than 10 hours. Therefore, it makes sense to optimize database insert