SQL Statements and Syntaxes
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SQL
Statement
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Syntax
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AND / OR
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SELECT column_name(s)
FROM table_name WHERE condition AND|OR condition |
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ALTER TABLE
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ALTER TABLE table_name
ADD column_name datatype
Or
ALTER TABLE table_name
DROP COLUMN column_name |
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AS (alias)
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SELECT column_name AS column_alias
FROM table_name
or
SELECT column_name
FROM table_name AS table_alias |
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BETWEEN
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SELECT column_name(s)
FROM table_name WHERE column_name BETWEEN value1 AND value2 |
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CREATE DATABASE
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CREATE DATABASE database_name
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CREATE TABLE
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CREATE TABLE table_name
( column_name1 data_type, column_name2 data_type, column_name2 data_type, ... ) |
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CREATE INDEX
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CREATE INDEX index_name
ON table_name (column_name)
or
CREATE UNIQUE INDEX index_name
ON table_name (column_name) |
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CREATE VIEW
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CREATE VIEW view_name AS
SELECT column_name(s) FROM table_name WHERE condition |
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DELETE
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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!!) |
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DROP DATABASE
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DROP DATABASE database_name
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DROP INDEX
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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 |
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DROP TABLE
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DROP TABLE table_name
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GROUP BY
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SELECT column_name,
aggregate_function(column_name)
FROM table_name WHERE column_name operator value GROUP BY column_name |
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HAVING
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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 |
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IN
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SELECT column_name(s)
FROM table_name WHERE column_name IN (value1,value2,..) |
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INSERT INTO
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INSERT INTO table_name
VALUES (value1, value2, value3,....)
or
INSERT INTO table_name
(column1, column2, column3,...) VALUES (value1, value2, value3,....) |
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INNER JOIN
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SELECT column_name(s)
FROM table_name1 INNER JOIN table_name2 ON table_name1.column_name=table_name2.column_name |
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LEFT JOIN
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SELECT column_name(s)
FROM table_name1 LEFT JOIN table_name2 ON table_name1.column_name=table_name2.column_name |
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RIGHT JOIN
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SELECT column_name(s)
FROM table_name1 RIGHT JOIN table_name2 ON table_name1.column_name=table_name2.column_name |
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FULL JOIN
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SELECT column_name(s)
FROM table_name1 FULL JOIN table_name2 ON table_name1.column_name=table_name2.column_name |
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LIKE
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SELECT column_name(s)
FROM table_name WHERE column_name LIKE pattern |
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ORDER BY
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SELECT column_name(s)
FROM table_name ORDER BY column_name [ASC|DESC] |
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SELECT
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SELECT column_name(s)
FROM table_name |
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SELECT *
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SELECT *
FROM table_name |
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SELECT DISTINCT
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SELECT DISTINCT column_name(s)
FROM table_name |
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SELECT INTO
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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 |
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SELECT TOP
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SELECT TOP number|percent
column_name(s)
FROM table_name |
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TRUNCATE TABLE
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TRUNCATE TABLE table_name
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UNION
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SELECT column_name(s) FROM
table_name1
UNION SELECT column_name(s) FROM table_name2 |
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UNION ALL
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SELECT column_name(s) FROM
table_name1
UNION ALL SELECT column_name(s) FROM table_name2 |
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UPDATE
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UPDATE table_name
SET column1=value, column2=value,... WHERE some_column=some_value |
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WHERE
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SELECT column_name(s)
FROM table_name WHERE column_name operator value |
Thanks for sharing this. Excellent introduction for SQL query writing .
ReplyDeleteCool blog. Provides info on SQL Server syntaxes and step by step info which helps a lot for the beginners. Keep doing. Thank you for providing such a valuable info
ReplyDelete