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In Dizzle you can make use of REPLACE to insert a new record into a table or
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delete and insert a record in a table if a record matching the primary key
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already exists. If no primary key or unique constraint is found on the table
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then REPLACE is equivalent to INSERT.
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REPLACE INTO table_1 SET a=5;
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REPLACE INTO table_1 VALUES (4);
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REPLACE is an extension to the SQL Standard that firtst appeared in MySQL.