SQL Quick Reference

# SQL Quick Reference From W3Schools

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SQL Statement | Syntax
--- | ---
AND / OR | SELECT column_name(s) FROM table_name WHERE condition AND|OR condition
ALTER TABLE | ALTER TABLE table_name ADD column_name datatype or ALTER TABLE table_name DROP COLUMN column_name
AS (alias) | SELECT column_name AS column_alias FROM table_name or SELECT column_name FROM table_name AS table_alias
BETWEEN | SELECT column_name(s) FROM table_name WHERE column_name BETWEEN value1 AND value2
CREATE DATABASE | CREATE DATABASE database_name

CREATE TABLE

CREATE TABLE table_name
(
column_name1 data_type,
column_name2 data_type,
column_name2 data_type,
...
)

CREATE INDEX | CREATE INDEX index_name ON table_name (column_name) or CREATE UNIQUE INDEX index_name ON table_name (column_name)
CREATE VIEW | CREATE VIEW view_name AS SELECT column_name(s) FROM table_name WHERE condition

DELETE

DELETE FROM table_name
WHERE some_column=some_value

or

DELETE FROM table_name
(Note: Deletes the entire table!!)

DELETE * FROM table_name
(Note: Deletes the entire table!!)

DROP DATABASE | DROP DATABASE database_name
DROP INDEX | DROP INDEX table_name.index_name (SQL Server) DROP INDEX index_name ON table_name (MS Access) DROP INDEX index_name (DB2/Oracle) ALTER TABLE table_name DROP INDEX index_name (MySQL)
DROP TABLE | DROP TABLE table_name

EXISTS

IF EXISTS (SELECT * FROM table_name WHERE id = ?)
BEGIN
--do what needs to be done if exists
END
ELSE
BEGIN
--do what needs to be done if not
END

GROUP BY | SELECT column_name, aggregate_function(column_name) FROM table_name WHERE column_name operator value GROUP BY column_name
HAVING | SELECT column_name, aggregate_function(column_name) FROM table_name WHERE column_name operator value GROUP BY column_name HAVING aggregate_function(column_name) operator value
IN | SELECT column_name(s) FROM table_name WHERE column_name IN (value1,value2,..)

INSERT INTO

INSERT INTO table_name
VALUES (value1, value2, value3,....)

or

INSERT INTO table_name
(column1, column2, column3,...)
VALUES (value1, value2, value3,....)

INNER JOIN | SELECT column_name(s) FROM table_name1 INNER JOIN table_name2 ON table_name1.column_name=table_name2.column_name
LEFT JOIN | SELECT column_name(s) FROM table_name1 LEFT JOIN table_name2 ON table_name1.column_name=table_name2.column_name
RIGHT JOIN | SELECT column_name(s) FROM table_name1 RIGHT JOIN table_name2 ON table_name1.column_name=table_name2.column_name
FULL JOIN | SELECT column_name(s) FROM table_name1 FULL JOIN table_name2 ON table_name1.column_name=table_name2.column_name
LIKE | SELECT column_name(s) FROM table_name WHERE column_name LIKE pattern
ORDER BY | SELECT column_name(s) FROM table_name ORDER BY column_name [ASC|DESC]
SELECT | SELECT column_name(s) FROM table_name
SELECT * | SELECT * FROM table_name
SELECT DISTINCT | SELECT DISTINCT column_name(s) FROM table_name

SELECT INTO

SELECT *
INTO new_table_name [IN externaldatabase]
FROM old_table_name

or

SELECT column_name(s)
INTO new_table_name [IN externaldatabase]
FROM old_table_name

SELECT TOP | SELECT TOP number|percent column_name(s) FROM table_name
TRUNCATE TABLE | TRUNCATE TABLE table_name
UNION | SELECT column_name(s) FROM table_name1 UNION SELECT column_name(s) FROM table_name2
UNION ALL | SELECT column_name(s) FROM table_name1 UNION ALL SELECT column_name(s) FROM table_name2
UPDATE | UPDATE table_name SET column1=value, column2=value,... WHERE some_column=some_value
WHERE | SELECT column_name(s) FROM table_name WHERE column_name operator value

Source : http://www.w3schools.com/sql/sql_quickref.asp

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