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sql table operations

Innocent Iguana answered on February 29, 2024 Popularity 9/10 Helpfulness 4/10

answer sql table operations

sql table operations

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CREATE TABLE table_name( -- Create table
	Id INT NOT NULL,  
  	col VARCHAR(64), 
  	PRIMARY KEY(Id)
);
INSERT INTO table_name(Id, col) VALUES(1,'Volkswagen'), (2,'Toyota'); -- Insert values in the table
UPDATE table_name SET column_name = new_value WHERE condition; -- Updating values of a table
DELETE from table_name [WHERE condition] -- Deleting rows from a table
TRUNCATE TABLE table_name [IMMEDIATE] -- Delete all entries from a table
DROP TABLE table_name; -- Deleting a table
ALTER TABLE old_table_name RENAME TO new_table_name; -- Renaming table
ALTER TABLE table_name ADD column_name data_type; -- Adding column to a table
ALTER TABLE table_name RENAME COLUMN old_column_name TO new_column_name; -- Rename column
ALTER TABLE table_name DROP COLUMN column_name; -- Deleting column of a table
ALTER TABLE table_name ALTER COLUMN column_name new_data_type; -- Change data type of a column
ALTER TABLE table_name ALTER COLUMN column_name DROP NOT NULL; -- Removing "NOT NULL" constraint
ALTER TABLE table_name MODIFY column_name INT AUTO_INCREMENT; -- Turn on "AUTO INCREMENT" 
ALTER TABLE table_name MODIFY column_name INT; -- Turn off "AUTO INCREMENT" 
ALTER TABLE table_name ADD CONSTRAINT fk_constraint_name FOREIGN KEY (column_name) REFERENCES other_table(other_column); -- Adding foreign key constraint
ALTER TABLE table_name DROP CONSTRAINT fk_constraint_name; -- Removing foreign key constraint

Popularity 9/10 Helpfulness 4/10 Language sql

Source: Grepper

Tags: operations sql

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Contributed on Feb 29 2024

Innocent Iguana

0 Answers Avg Quality 2/10

sql table operations

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