How can I do 'insert if not exists' in MySQL?

How can I do 'insert if not exists' in MySQL?

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difference between primary key and unique key

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Add primary key to existing table

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ALTER TABLE to add a composite primary key

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Remove Primary Key in MySQL

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Strings as Primary Keys in SQL Database [closed]

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How can I define a composite primary key in SQL?

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SQL - many-to-many table primary key

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sql primary key and index

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Foreign key referring to primary keys across multiple tables?

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Auto Increment after delete in MySQL

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Can a foreign key refer to a primary key in the same table?

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SQL: set existing column as Primary Key in MySQL

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Can I use VARCHAR as the PRIMARY KEY?

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SQL Server: how to add new identity column and populate column with ids?

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