Similarly here we use create table statement to create a new table that is emp with different attributes such as emp_id with integer data type and primary key constraint, emp_first_name with the text data type, emp_last_name with the text data type, emp_address_id with integer and foreign key constraint as shown in above example. Now create one more table that is emp by using the following statement as follows.Ĭreate table if not exists emp (emp_id integer primary key, emp_first_name text, emp_last_name text, emp_address_id integer, foreign key (emp_address_id) references details (emp_address_id)) The end result of the above statement is shown in the below screenshot. In the above example, we use create table statement to create a new table name as details with a different attribute such as emp_address_id with integer data type and primary key constraint, flat_no with the text data type, a street with the text data type, emp_city with text data type and state with text data type as shown in the above statement. On the off chance that the understood DELETE FROM makes any conceded foreign key limitations be disregarded, and the infringement actually exists when the exchange is submitted, a blunder is returned at the hour of submitting.įirst, we need to create two different tables by using the following statement as follows.Ĭreate table if not exists details (emp_address_id integer primary key, flat_no text, street text, emp_city text, pincode text, state text)
In the event that the understood DELETE FROM executed as a component of a DROP TABLE order abuses any quick foreign key limitations, a blunder is returned and the table isn’t dropped. Conversely, a certain DELETE FROM makes any designed foreign key activities occur. Any triggers appended to the table are dropped from the information base composition before the understood DELETE FROM is executed, so this can’t make any triggers fire. In the event that foreign key imperatives are empowered, a DROP TABLE command plays out an implied DELETE FROM command prior to eliminating the table from the information base schema. The discretionary IF EXISTS condition smothers the blunder that would ordinarily result if the table doesn’t exist. All files and triggers related to the table are additionally erased. The dropped table is totally taken out from the data set blueprint and the disk document. The DROP TABLE statement eliminates a table added with the CREATE TABLE statement. Now let’s see the how drop table works in SQLite as follows In the above syntax we used the drop table command to drop the table, here if exists is used to check specified table name may available on a database or not, the specified schema name means our actual database name and the specified table name means an actual table that we need to drop from the database.
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