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This article mainly introduces what is the use of TRUNCATE AND Deleted in mysql. It has certain reference value. Interested friends can refer to it. I hope you will have a lot of gains after reading this article. Let Xiaobian take you to understand it together.

TRUNCATE TABLE and Delete without WHERE function is the same, are to delete all the data in the table, but TRUNCATE TABLE faster, occupy less log, this is because TRUNCATE TABLE directly releases the data page and only records the release of the data page in the transaction log, and Delete is a line by line deletion, in the transaction log to record the deletion of each record.

Can you replace Delete without WHERE with TRUNCATE TABLE? This is not possible in the following cases:

1. TRUNCATE TABLE cannot be used when the identity is to be retained, because TRUNCATE TABLE resets the identity.

2. TRUNCATE TABLE cannot be used when triggers are needed, it will not fire triggers.

TRUNCATE TABLE cannot be used for tables referenced by FOREIGN KEY constraints (i.e., tables with primary keys, not tables with foreign keys).

TRUNCATE TABLE cannot be used for tables that participate in indexed views. Note that TRUNCATE TABLE refers to indexed views, not ordinary views.

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