How to insert if NOT EXISTS in SQLite?

If you have a table called memos that has two columns id and text you should be able to do like this: INSERT INTO memos(id,text) SELECT 5, ‘text to insert’ WHERE NOT EXISTS(SELECT 1 FROM memos WHERE id = 5 AND text = ‘text to insert’);

Is EXISTS SQLite?

Introduction to SQLite EXISTS operator The EXISTS operator is a logical operator that checks whether a subquery returns any row. In this syntax, the subquery is a SELECT statement that returns zero or more rows. If the subquery returns one or more row, the EXISTS operator return true.

How do I drop a table in SQLite?

To drop a table in SQLite, use the DROP TABLE statement. Running this statement removes the table from the database. It is completely removed from the database schema and the disk file. Therefore the table can not be recovered.

What is an Upsert operation?

The term upsert is a portmanteau – a combination of the words “update” and “insert.” In the context of relational databases, an upsert is a database operation that will update an existing row if a specified value already exists in a table, and insert a new row if the specified value doesn’t already exist.

How do I create a view in SQLite?

SQLite CREATE VIEW statement First, specify a name for the view. The IF NOT EXISTS option only creates a new view if it doesn’t exist. If the view already exists, it does nothing. Second, use the the TEMP or TEMPORARY option if you want the view to be only visible in the current database connection.

What is the difference between upsert and INSERT?

The INSERT option pushes the incoming records to the destination. The UPDATE option keeps track of the records being updated in the database table. The UPSERT option is the combination of ‘Update’ and ‘Insert’ which means that it will check for the records that are inserted or updated.

What is INSERT and upsert?

upsert stands for both update and insert. insert is a dml statement used to insert the records in to the object. upsert can be used when you are not aware of the records that are coming in to the insatance .. i.e whether the records are there to update or insert… then u can use the upsert dml statement.