MS SQL Database basic

DATABASE BASICMD.WALIUZZAMAN

1.DATABASE CREATE:

CREATE DATABASE mydb

mydb

2.DATABASE RENAME:ALTER DATABASE mydb MODIFY NAME= mynewdb

mynewdb

Method:1

Method:2Sp_renameDB ‘mynewdb’ , ‘mydb’

mydb

3.DROP DATABASE

DROP DATABSAE mydb

mydb

4.CREATE TABLE

CREATE TABLE mytable(id int primary key ,name nvarchar(50) not null,age int(20))

NEED: TABLE NAME, COLOMN NAME ,DATA TYPE+SIZE.OPTIONAL:CONSTRAINTS(such as primary key, check constraints)

mytable

VIEW TABLE PROPERTY

EXEC sp_help mytable

5.INSERT DATA IN TABLEINSERT INTO mytable

VALUES ( 1,`wali`,25)

Method:1(single row insert)

Method:2(multirow insert)

INSERT INTO mytable(id,name,age )VALUES ( 1,`wali`,25),

( 2,`akash`,26);

6.UPDATE DATA IN TABLEUPDATE mytable SET name =‘batash’ ,age=25WHERE id=2;

7.DELETE DATA IN TABLEDELETE mytable WHERE id=1;

Delete select value:

Delete all value:DELETE FROM mytableDelete full table:DROP TABLE mytable

8.BASIC SELECT STATETMENT

SELECT * FROM mytable;Show all values in table:

Show selected one column values: SELECT age FROM mytable;

Show selected multiple column values:

SELECT age,name FROM mytable;

9.SELECT STATEMENT

SELECT DISTINCT name FROM mytable

(USING DISTINCT )

10.SELECT STATEMENT

For using WHERE Clause at first we need to know about WHERE Clause operators

(USING WHERE Clause)

WHERE Clause OPERATORS=, >, <, >=, <=, <>, !=, !>, !<AND,OR,NOTBETWEENLIKEINALL,ANY,SOMEEXISTS

11.SELECT STATEMENTSELECT * FROM mytable WHERE age = 25SELECT * FROM mytable WHERE age != 25SELECT * FROM mytable WHERE age = 25 AND name = ‘wali’SELECT * FROM mytable WHERE age = 25 OR name = ‘wali’SELECT * FROM mytable WHERE name LIKE ‘w%’SELECT * FROM mytable WHERE name LIKE ‘%wa%’SELECT * FROM mytable WHERE name NOT LIKE ‘%wa%’SELECT * FROM mytable WHERE name = ‘aksh’ OR name = ‘wali’SELECT * FROM mytable WHERE name IN (‘aksh’,‘wali’)SELECT * FROM mytable WHERE EXISTS (SELECT id FROM mytable2 WHERE fee>500)

(USING WHERE Clause)

12.SELECT STATEMENT

SELECT * FROM mytable ORDER BY age DESC

(USING ORDER BY Clause)part-1SHOW ALL VALUES:

SELECT * FROM mytable ORDER BY age ASC

ASC=ascending;DESC=descending

Note:

13.SELECT STATEMENT

SELECT name FROM mytable ORDER BY name DESC

(USING ORDER BY Clause)part-2SHOW SELECTED COLUMN VALUES:

SELECT name FROM mytable ORDER BY age ASC

ASC=ascending;DESC=descending

Note:

14.SELECT STATEMENTCreating Groups of data

15.SELECT STATEMENT

AGGREGATE MEANSSUM(numeric)AVG(numeric)MIN/MAX(int,datetime,varchar,..)COUNT(*)-return number of rows

AGGREGATE (USING GROUP BY Clause)

16.SELECT STATEMENTAGGREGATE (USING GROUP BY Clause)

SELECT id ,SUM(salary) FROM mytable GROUP BY id

17.SELECT STATEMENT

SELECT id ,SUM(salary) as totalsalary FROM mytable GROUP BY id


18.SELECT STATEMENT

SELECT id ,SUM(salary) as totalsalary, AVG(salary) as aversalary FROM mytable GROUP BY id


19.SELECT STATEMENT

SELECT COUNT(*) FROM mytable


20.SELECT STATEMENT(USING JOIN Clause)

JOIN

INNER JOIN OUTER JOIN FULL JOIN CROSS JOIN

LEFT JOIN RIGHT JOIN

21.SELECT STATEMENT

At first we need two table

(USING JOIN Clause)

22.SELECT STATEMENT

Simple basic command: (USING JOIN Clause)

SHOW ALL VALUES FROM BOTH TABLEINNER JOIN

SELECT * FROM student INNER JOIN guardian On student.studentid=guardian. guardianid

23.SELECT STATEMENT

Here is output:

(USING JOIN Clause)

Before joining

After joining

24.SELECT STATEMENT

advance command:

(USING JOIN Clause)

SHOW selected column VALUES FROM BOTH TABLE

INNER JOIN

25.SELECT STATEMENT

INNER JOIN (USING JOIN Clause)

SELECT s.studentid as ‘id student table’, g.studentid as ‘id

guardian table’, s.name,g.fathername,g.mothernameFROM student s INNER JOIN guardian gOn s.studentid=g.studentid

s=student tableg=guardian table

26.SELECT STATEMENT (USING JOIN Clause)

Before joining

After INNER joining

27.SELECT STATEMENT

BASIC (USING JOIN Clause)

OUTER JOIN

LEFT RIGHT

COLUMN COLUMN

RIGHT JOINLEFT JOIN

27.SELECT STATEMENTadvance command:

(USING JOIN Clause)


OUTER JOIN(LEFT JOIN)

28.SELECT STATEMENTOUTER JOIN –(LEFT JOIN) (USING JOIN Clause)


guardian table’, s.name,g.fathername,g.mothernameFROM student s LEFT JOIN guardian bOn s.studentid=g.studentid



Before joining

After LEFT joining

30.SELECT STATEMENTadvance command:

(USING JOIN Clause)


OUTER JOIN(RIGHT JOIN)

31.SELECT STATEMENTOUTER JOIN –(RIGHT JOIN) (USING JOIN Clause)


guardian table’, s.name,g.fathername,g.mothernameFROM student s RIGHT JOIN guardian bOn s.studentid=g.studentid



Before joining

After RIGHT joining


FULL JOIN

34.SELECT STATEMENT

FULL JOIN

(USING JOIN Clause)


guardian table’, s.name,g.fathername,g.mothernameFROM student s FULL JOIN guardian bOn s.studentid=g.studentid



Before joining

After FULL joining


CROSS JOIN

To be continue..............

FLASH BACK

1.DATABASE— create,rename,delete

2.TABLE— CREATE, data INSERT+UPDATE ,data+table DELETE

FLASH BACK a.basic select statement

b. select statement—(using distinct) c.(using where clause)+where clause

operators d.order by clause(asc,desc) e.group by

clause(aggregate—sum,min/max,avg,count) f.join—inner,outer(left+right),full join,

3.SELECT STATEMENT:


CROSS JOIN


CROSS JOINWali

Akash

Reza

Foyel

Murad

Haider

diit

horizone


CROSS JOINdiit_table horizone_table


CROSS JOIN

SELECT diit_student_name,horizon_student_name

FROM diit_table CROSS JOIN

horizon_table

33.SELECT STATEMENT (USING JOIN Clause) CROSS JOIN

diit_table horizone_tableBEFORE JOINING

After CROSS JOINING

MS SQL Database basic

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