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MySQL avoids duplicate Insert recording method (Ignore,replace,on DUPLICATE KEY UPDATE)

This article refers to the link: http://blog.csdn.net/jbboy/article/details/46828917"I think the article is more suitable for learning and reference, it is worth a look"This article to provide you with three kinds of in MySQL to avoid repeated

MySQL avoids duplicate Insert recording method (Ignore,replace,on DUPLICATE KEY UPDATE)

This article to provide you with three kinds of in MySQL to avoid repeated insertion record method, mainly refers to the Ignore,replace,on DUPLICATE key update three methods, you can try to reference.Case one: Using the Ignore keywordIf the

MySQL Avoid duplicate insertion record method (Ignore,replace,on DUPLICATE KEY UPDATE)

Case one: Use the Ignore keyword If the uniqueness of the record is distinguished by the primary key primary or unique index unique, it is possible to avoid duplicate insertion records: The code is as follows Copy Code 1

MySQL on DUPLICATE KEY UPDATE, REPLACE into

INSERT into on DUPLICATE key UPDATE with REPLACEinto, two commands can handle duplicate key-value problems, what difference does it make in practice?The precondition is that the table must have a unique index or primary key.1, replace found

[Switch] if the primary key conflict occurs, update it. Otherwise, insert (on duplicate key update)

MySQL "on duplicate key update" SyntaxIf the on duplicate key update is specified at the end of the insert statement and the duplicate value appears in a unique index or primary key after the row is inserted, update is executed on the row with the

MySQL avoids duplicate Insert recording method (Ignore,replace,on DUPLICATE KEY UPDATE)

This article to provide you with three kinds of in MySQL to avoid repeated insertion record method, mainly refers to the Ignore,replace,on DUPLICATE key update three methods, you can try to reference.Case one: Using the Ignore keywordIf the

MySQL "on duplicate key update" Syntax

Related Articles: MySQL "on duplicate key update" Syntax Insert into .. on duplicate key to update multiple rows Http://dev.mysql.com/doc/refman/5.1/zh/sql-syntax.html#insert     MySQL "on duplicate key update" Syntax If the on duplicate key update

MySQL Insert syntax considerations (on DUPLICATE KEY UPDATE)

MySQL Insert syntax considerations (on DUPLICATE KEY UPDATE) INSERT Grammar INSERT [Low_priority | DELAYED | High_priority] [IGNORE][Into] tbl_name [(Col_name,...)]VALUES ({expr | DEFAULT},...), (...),...[on DUPLICATE KEY UPDATE col_

Several things about MySQL insert (delayed,ignore,on DUPLICATE KEY UPDATE) _mysql

Insert Syntax 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]

If the SQL statement inserts duplicate primary keys or data already exists, update the data.

This is often the case when developing databases:When a piece of data does not exist, insert the data. If the primary key of the data already exists in the database, update the data.How do you do this? First, query data based on the primary key, and

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