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What is the role of Delete in SQLite, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain for you in detail, people with this need can come to learn, I hope you can gain something.

SQLite Delete detailed explanation

SQLite's DELETE query is used to delete existing records in the table. You can use a DELETE query with a WHERE clause to delete the selected row, otherwise all records will be deleted.

Grammar

The basic syntax for a DELETE query with a WHERE clause is as follows:

DELETE FROM table_nameWHERE [condition]

You can use AND or OR operators to combine N quantities of conditions.

Example

Suppose the COMPANY table has the following records:

ID NAME AGE ADDRESS SALARY--1 Paul 32 California 20000.02 Allen 25 Texas 15000.03 Teddy 23 Norway 20000.04 Mark 25 Rich-Mond 65000.05 David 27 Texas 85000.06 Kim 22 South-Hall 45000.07 James 24 Houston 10000.0

Here is an example that removes a customer with an ID of 7:

Sqlite > DELETE FROM COMPANY WHERE ID = 7

The COMPANY table now has the following records:

ID NAME AGE ADDRESS SALARY--1 Paul 32 California 20000.02 Allen 25 Texas 15000.03 Teddy 23 Norway 20000.04 Mark 25 Rich-Mond 65000.05 David 27 Texas 85000.06 Kim 22 South-Hall 45000.0

If you want to delete all records from the COMPANY table, you do not need to use the WHERE clause, and the DELETE query is as follows:

Sqlite > DELETE FROM COMPANY

Now, there are no records in the COMPANY table because all records have been deleted by the DELETE statement.

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