SQL

• SELECT column_name(s)
• FROM table_name

• SELECT column_name(s)
• FROM table_name
• WHERE condition
• AND|OR condition

ALTER TABLE table_name ADD column_name datatype

or

ALTER TABLE table_name DROP COLUMN column_name

SELECT column_name AS column_aliasFROM table_name

or

SELECT column_nameFROM table_name  AS table_alias

• SELECT column_name(s)
• FROM table_name
• WHERE column_name
• BETWEEN value1 AND value2

CREATE DATABASE database_name

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

• CREATE INDEX index_name
• ON table_name (column_name)

or

• CREATE UNIQUE INDEX index_name
• ON table_name (column_name)

• CREATE VIEW view_name AS
• SELECT column_name(s)
• FROM table_name
• WHERE condition

• 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 database_name

• 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 table_name

• SELECT column_name, aggregate_function(column_name)
• FROM table_name
• WHERE column_name operator value
• GROUP BY column_name

• 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

• SELECT column_name(s)
• FROM table_name
• WHERE column_name
• IN (value1,value2,..)

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

or

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

• SELECT column_name(s)
• FROM table_name1
• INNER JOIN table_name2 
• ON table_name1.column_name=table_name2.column_name

• SELECT column_name(s)
• FROM table_name1
• LEFT JOIN table_name2 
• ON table_name1.column_name=table_name2.column_name

• SELECT column_name(s)
• FROM table_name1
• RIGHT JOIN table_name2 
• ON table_name1.column_name=table_name2.column_name

• SELECT column_name(s)
• FROM table_name1
• FULL JOIN table_name2 
• ON table_name1.column_name=table_name2.column_name

• SELECT column_name(s)
• FROM table_name
• WHERE column_name LIKE pattern

• SELECT column_name(s)
• FROM table_name
• ORDER BY column_name [ASC|DESC]

• SELECT *
• FROM table_name

• SELECT DISTINCT column_name(s)
• FROM table_name

• 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 number|percent column_name(s)
• FROM table_name

TRUNCATE TABLE table_name

• SELECT column_name(s) FROM table_name1
• UNION
• SELECT column_name(s) FROM table_name2

• SELECT column_name(s) FROM table_name1
• UNION
• ALLSELECT column_name(s) FROM table_name2

• UPDATE table_name
• SET column1=value, column2=value,...
• WHERE some_column=some_value

• SELECT column_name(s)
• FROM table_name
• WHERE column_name operator value