Thursday, February 5, 2009

எளிய தமிழில் SQL - பாகம் 14

SQL Server பயன்பாட்டை எவ்வாறு நிறுவுவது என திரு. G. ராஜாராமன் சவுதி அரேபியா கேட்டிருந்தார். அவருக்காக இணையத்தில் தேடியபோது ஒரு அருமையான தளமுகவரி கிடைத்தது அதை இங்கே பகிர்கிறேன்.

ஒவ்வொரு திரையாகப் படம் பிடித்து அருமையாக விளக்கியிருக்கிறார்கள்.
http://www.functionx.com/sqlserver/Lesson01.htm

அவர் கேட்டதற்கு இணங்கி அப்படி ஒரு பதிவைத் தமிழில் வெளியிட நினைத்தேன். அழகான செயல்முறை விளக்கத்துடன் ஆங்கிலத்தில் இருந்தாலும் எளிதாகப் புரியும் வண்ணம் இருந்ததால் அதன் சுட்டியை இங்கே பகிர்ந்துவிட்டேன்.

மேலும் SQL க்கான Syntax அட்டவணையை http://www.w3schools.com/sql/sql_quickref.asp ல் கண்டேன். அதனைக் கீழே தந்திருக்கிறேன்.

நன்றி : http://www.w3schools.com

இந்த SQL Syntaxகளை நன்றாகப் படித்து மனதில் வைத்துக்கொள்ளவும்.

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
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



Select Statement
SELECT "column_name" FROM "table_name"

Distinct
SELECT DISTINCT "column_name"
FROM "table_name"

Where

SELECT "column_name"
FROM "table_name"
WHERE "condition"

And/Or
SELECT "column_name"
FROM "table_name"
WHERE "simple condition"
{[AND|OR] "simple condition"}+

In
SELECT "column_name"
FROM "table_name"
WHERE "column_name" IN ('value1', 'value2', ...)

Between
SELECT "column_name"
FROM "table_name"
WHERE "column_name" BETWEEN 'value1' AND 'value2'

Like
SELECT "column_name"
FROM "table_name"
WHERE "column_name" LIKE {PATTERN}

Order By
SELECT "column_name"
FROM "table_name"
[WHERE "condition"]
ORDER BY "column_name" [ASC, DESC]

Count
SELECT COUNT("column_name")
FROM "table_name"

Group By
SELECT "column_name1", SUM("column_name2")
FROM "table_name"
GROUP BY "column_name1"

Having
SELECT "column_name1", SUM("column_name2")
FROM "table_name"
GROUP BY "column_name1"
HAVING (arithematic function condition)

Create Table Statement
CREATE TABLE "table_name"
("column 1" "data_type_for_column_1",
"column 2" "data_type_for_column_2",
... )

Drop Table Statement
DROP TABLE "table_name"

Truncate Table Statement
TRUNCATE TABLE "table_name"

Insert Into Statement
INSERT INTO "table_name" ("column1", "column2", ...)
VALUES ("value1", "value2", ...)

Update Statement
UPDATE "table_name"
SET "column_1" = [new value]
WHERE {condition}

Delete From Statement
DELETE FROM "table_name"
WHERE {condition}

6 comments:

SHANTHI said...

வெற்றிகரமாக 14 வது பாகம் .....வாழ்த்துகள் அண்ணா

தமிழ்நெஞ்சம் said...

Thanks to : SHANTHI

கபீஷ் said...

Hi Tamil Please let me know your ph.no and email id asap i want to do certificaiton in sqlserver 2008. I need to your guidence.

Kabheesh

rajaraman_ecs said...

நன்றி

அன்புடன்

G.ராஜாராமன் சவுதி அரேபியா

ஜிம்ஷா said...

படித்தேன் புரிந்து கொண்டேன்.

தமிழ்நெஞ்சம் said...

Thanks to : கபீஷ் , rajaraman_ecs, ஜிம்ஷா

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