SQL Statements

SQL statements are commands used to create, modify, retrieve, and delete data from a database. Here are some of the most common SQL statements:

SELECT: Used to retrieve data from one or more tables.
INSERT INTO: Used to add new data into a table.
UPDATE: Used to modify existing data in a table.
DELETE: Used to remove data from a table.
CREATE TABLE: Used to create a new table.
ALTER TABLE: Used to modify the structure of an existing table.
DROP TABLE: Used to delete a table from the database.
CREATE INDEX: Used to create an index on a table.
DROP INDEX: Used to remove an index from a table.
JOIN: Used to combine data from multiple tables.
GROUP BY: Used to group data by one or more columns.
ORDER BY: Used to sort the result set by one or more columns.
WHERE: Used to filter data based on a condition.
HAVING: Used to filter data based on a condition after a GROUP BY clause has been applied.

Here’s an example of a SELECT statement:

				
					SELECT column1, column2, ...
FROM table_name
WHERE condition;

This statement retrieves data from the specified columns in the table_name table and filters the results based on the specified condition.

Here’s an example of an INSERT INTO statement:

				
					INSERT INTO table_name (column1, column2, ...)
VALUES (value1, value2, ...);

This statement inserts new data into the specified columns of the table_name table with the specified values.

SQL statements can become more complex depending on the task being performed, but these are some of the basic statements used in SQL.

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