Top 30 SQL QUERIES
1. AND / OR
|
SELECT column_name(s)
FROM table_name WHERE condition AND|OR condition |
2. ALTER TABLE
|
ALTER TABLE table_name
ADD column_name datatype
or
ALTER TABLE table_name
DROP COLUMN column_name |
3. AS (alias)
|
SELECT column_name AS column_alias
FROM table_name
or
SELECT column_name
FROM table_name AS table_alias |
4. BETWEEN
|
SELECT column_name(s)
FROM table_name WHERE column_name BETWEEN value1 AND value2 |
5.CREATE DATABASE
|
CREATE DATABASE database_name
|
6.CREATE TABLE
|
CREATE TABLE table_name
( column_name1 data_type, column_name2 data_type, ... ) |
7.CREATE INDEX
|
CREATE INDEX index_name
ON table_name (column_name)
or
CREATE UNIQUE INDEX index_name
ON table_name (column_name) |
8.CREATE VIEW
|
CREATE VIEW view_name AS
SELECT column_name(s)
FROM table_name WHERE condition |
9.DELETE
|
DELETE FROM table_name WHERE some_column=some_value
or
DELETE FROM table_name
( Deletes the entire table)
DELETE * FROM table_name
( Deletes the entire table) |
10.DROP DATABASE
|
DROP DATABASE database_name
|
11.DROP INDEX
|
DROP INDEX index_name (MySQL) |
12.DROP TABLE
|
DROP TABLE table_name
|
13.GROUP BY
|
SELECT column_name,
aggregate_function(column_name)
FROM table_name WHERE column_name operator value GROUP BY column_name |
14.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 |
15.IN
|
SELECT column_name(s)
FROM table_name WHERE column_name IN (value1,value2,value3..) |
16.INSERT INTO
|
INSERT INTO table_name
VALUES (value1, value2,....)
or
INSERT INTO table_name
(column1, column2,...) VALUES (value1, value2,....) |
17.INNER JOIN
|
SELECT column_name(s)
FROM table_name1 INNER JOIN table_name2 ON table_name1.column_name=table_name2.column_name |
18.LEFT JOIN
|
SELECT column_name(s)
FROM table_name1 LEFT JOIN table_name2 ON table_name1.column_name=table_name2.column_name |
19.RIGHT JOIN
|
SELECT column_name(s)
FROM table_name1 RIGHT JOIN table_name2 ON table_name1.column_name=table_name2.column_name |
20.FULL JOIN
|
SELECT column_name(s)
FROM table_name1 FULL JOIN table_name2 ON table_name1.column_name=table_name2.column_name |
22.LIKE
|
SELECT column_name(s)
FROM table_name WHERE column_name LIKE pattern |
23.ORDER BY
|
SELECT column_name(s)
FROM table_name ORDER BY column_name [ASC|DESC] |
24.SELECT
|
SELECT column_name(s)
FROM table_name |
25.SELECT *
|
SELECT *
FROM table_name |
26.SELECT DISTINCT
|
SELECT DISTINCT column_name(s)
FROM table_name |
27.SELECT INTO
|
SELECT *
INTO new_table_name FROM old_table_name
or
SELECT column_name(s)
INTO new_table_name FROM old_table_name |
28.SELECT TOP
|
SELECT TOP number|percent
column_name(s)
FROM table_name |
29.TRUNCATE TABLE
|
TRUNCATE TABLE table_name
|
30.UNION
|
SELECT column_name(s) FROM
table_name1
UNION SELECT column_name(s) FROM table_name2 |
31.UNION ALL
|
SELECT column_name(s) FROM
table_name1
UNION ALL
SELECT column_name(s) FROM table_name2
|
32.UPDATE
|
UPDATE table_name
SET column1=value, column2=value,... WHERE some_column=some_value |
33.WHERE
|
SELECT column_name(s)
FROM table_name WHERE column_name operator value |
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