Flutter sqlite command line database how to#

VALUES( 'Full Stack Developer', 140000) Code language: SQL (Structured Query Language) ( sql ) REPLACE INTO positions (title, min_salary) The following REPLACE statement inserts a new row into the positions table because the position title Full Stack Developer is not in the positions table. Suppose, you want to add a position into the positions table if it does not exist, in case the position exists, update the current one. ON positions (title) Code language: SQL (Structured Query Language) ( sql ) The following statement creates a unique index on the title column of the positions table to ensure that it doesn’t have any duplicate position title: CREATE UNIQUE INDEX idx_positions_title SELECT * FROM positions Code language: SQL (Structured Query Language) ( sql ) Third, verify the insert using the following SELECT statement. ( 'Architect', 150000) Code language: SQL (Structured Query Language) ( sql ) INSERT INTO positions (title, min_salary) Second, insert some rows into the positions table. ) Code language: SQL (Structured Query Language) ( sql ) The SQLite REPLACE statement examplesįirst, create a new table named positions with the following structure. Let’s take a look at some examples of using the SQLite REPLACE statement to understand how it works. Or in a short form: REPLACE INTO table(column_list) VALUES(value_list) Code language: SQL (Structured Query Language) ( sql ) INSERT OR REPLACE INTO table(column_list) The following illustrates the syntax of the REPLACE statement. In the second step, if any constraint violation e.g., NOT NULL constraint occurs, the REPLACE statement will abort the action and roll back the transaction. First, delete the existing row that causes a constraint violation.

The idea of the REPLACE statement is that when a UNIQUE or PRIMARY KEY constraint violation occurs, it does the following: Introduction to the SQLite REPLACE statement

Flutter sqlite command line database how to#

Summary: in this tutorial, you will learn how to use the SQLite REPLACE statement to insert or replace the existing row in a table.