The document discusses various SQL commands including SELECT, SELECT DISTINCT, WHERE, ORDER BY, AND, OR and combinations of these. It provides examples of using each command to select data from a sample database table. For SELECT, it shows how to select specific columns, all columns, and use DISTINCT. For WHERE, it demonstrates filtering records based on column values. ORDER BY examples sort the results based on columns. AND and OR operator examples filter records based on multiple conditions using logical AND and OR.

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2. 2

3. Name ID
1. Setu haque
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4. The Commands That Are Going To Be Discussed
1.SELECT
2.SELECT DISTINCT
3.WHERE
4.ORDER BY
5.AND
6.OR
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5. SELECT
Function of SELECT
The SELECT statement is used to select data from a database.
The SQL SELECT Statement
The SELECT statement is used to select data from a database.
The result is stored in a result table, called the result-set.
SQL SELECT Syntax
SELECT ColumnName,ColumnName FROM TableName;
and
SELECT * FROM TableName;
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6. SELECT
Demo Database
StudentId StudentName Course Section
13103007 Bithi Akter CSC433 D
13103010 Sanjida Tasnim CSC434 E
13103013 Shohana Akter CSC434 D

7. SELECT
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8. SELECT
SELECT Column Example
The following SQL statement selects the “StudentId" columns from the “Students"
table:
The Practical Output

9. SELECT
SELECT Column Example
The following SQL statement selects the “StudentId“ and “StudentName”
columns from the “Students" table:
The Practical Output

10. SELECT
SELECT Column Example
The following SQL statement selects the all columns by using *(staric sign) from
the “Students" table:
The Practical Output

11. SELECT
DISTINCT
Function of SELECT DISTINCT
The SELECT DISTINCT statement is used to return only distinct (different) values.
The SQL SELECT DISTINCT Statement
In a table, a column may contain many duplicate values; and sometimes you only
want to list the different (distinct) values.
The DISTINCT keyword can be used to return only distinct (different) values.
SQL SELECT DISTINCT Syntax
SELECT DISTINCT ColumnName,ColumnName FROM TableName;

12. SELECT
DISTINCT Demo Database
StudentId StudentName Course Section
13103007 Bithi Akter CSC433 D
13103010 Sanjida Tasnim CSC434 E
13103013 Shohana Akter CSC434 D

13. SELECT
DISTINCT
SELECT DISTINCT Column Example
The following SQL statement selects the “CourseNo" columns from the “Students"
table:
The Practical Output

14. SELECT
DISTINCT
SELECT DISTINCT Column Example
The following SQL statement selects the “StudentId“ and “CourseNo” columns
from the “Students" table:
The Practical Output

15. WHERE
Function of WHERE
The WHERE clause is used to filter records.
The SQL WHERE Clause
The WHERE clause is used to extract only those records that fulfill a specified
criterion.
SQL WHERE Syntax
SELECT ColumnName,ColumnName FROM TableName WHERE ColumnName
operator value;

16. WHERE
Demo Database
StudentId StudentName Course Section
13103007 Bithi Akter CSC433 D
13103010 Sanjida Tasnim CSC434 E
13103013 Shohana Akter CSC434 D

17. WHERE
WHERE Column Example
The following SQL statement selects the “Section" columns from the CourseNo
“CSC434", in the “Students" table:
The Practical Output

18. WHERE
WHERE Column Example
The following SQL statement selects all the students from the CourseNo
“CSC434", in the “Students" table:
The Practical Output

19. WHERE
Operators in The WHERE Clause
The following operators can be used in the WHERE clause:
Operator Description
= Equal
<> Not equal. Note: In some versions of SQL this
operator may be written as !=
> Greater than
< Less than
>= Greater than or equal
<= Less than or equal
BETWEEN Between an inclusive range
LIKE Search for a pattern
IN To specify multiple possible values for a column

20. ORDER BY
Function of ORDER BY DISTINCT
The ORDER BY keyword is used to sort the result-set.
The SQL ORDER BY Keyword
The ORDER BY keyword is used to sort the result-set by one or more columns.
The ORDER BY keyword sorts the records in ascending order by default. To sort
the records in a descending order, DESC keyword is used.
SQL ORDER BY Syntax
SELECT ColumnName,ColumnName FROM TableName ORDER BY
ColumnName,ColumnName ASC|DESC; [Here, ASC=Ascending &
DESC=Descending]

21. ORDER
BY Demo Database
StudentId StudentName Course Section
13103007 Bithi Akter CSC433 D
13103010 Sanjida Tasnim CSC434 E
13103013 Shohana Akter CSC434 D

22. ORDER BY
ORDER BY Column Example
The following SQL statement selects the "CourseNo" from the “Students" table,
sorted by the “StudentId" column:
The Practical Output

23. ORDER BY
ORDER BY Column Example
The following SQL statement selects the "CourseNo" from the “Students" table,
sorted by the “StudentId" column in descending form:
The Practical Output

24. ORDER BY
ORDER BY Column Example
The following SQL statement selects all students from the “Students" table, sorted
by the “StudentId" column:
The Practical Output

25. ORDER BY
ORDER BY Column Example
The following SQL statement selects all students from the “Students" table, sorted
by the “StudentId" column in descending form:
The Practical Output

26. AND Operator
Function of AND Operators
The AND operators are used to filter records based on more than one condition.
The SQL AND Operators
The AND operator displays a record if both the first condition AND the second
condition are true.
SQL AND Syntax
SELECT ColumnName,ColumnName FROM TableName WHERE ColumnName
operator value AND ColumnName operator value;

27. AND Operator
Demo Database
StudentId StudentName Course Section
13103007 Bithi Akter CSC433 D
13103010 Sanjida Tasnim CSC434 E
13103013 Shohana Akter CSC434 D

28. AND Operator
AND Operator Column Example
The following SQL statement selects the “StudentId” from the Section “D" AND the
CourseNo “CSC434", in the “Students" table:
The Practical Output

29. AND Operator
AND Operator Column Example
The following SQL statement selects all students from the Section “D" AND the
CourseNo “CSC434", in the “Students" table:
The Practical Output

30. OR Operator
Function of OR Operators
The OR operators are used to filter records based on more than one condition.
The SQL OR Operators
The OR operator displays a record if either the first condition OR the second
condition is true.
SQL OR Syntax
SELECT ColumnName,ColumnName FROM TableName WHERE
ColumnName operator value OR ColumnName operator value;

31. OR Operator
Demo Database
StudentId StudentName Course Section
13103007 Bithi Akter CSC433 D
13103010 Sanjida Tasnim CSC434 E
13103013 Shohana Akter CSC434 D

32. OR Operator
OR Operator Column Example
The following SQL statement selects the “StudentName” and “Section” coloumns
from the StudentId “13103013" OR the CourseNo “CSC434", in the “Students"
taTbhlee :Practical Output

33. OR Operator
OR Column Example
The following SQL statement selects all students from the StudentId “13103013"
OR the CourseNo “CSC434", in the “Students" table :
The Practical Output

34. Combination of AND & OR Operators
Combining AND & OR Operators
We can also combine AND and OR (use parenthesis to form complex
expressions).
SQL Combination AND & OR Operators Syntax
SELECT ColumnName,ColumnName FROM TableName WHERE
ColumnName operator value AND (ColumnName operator value OR
ColumnName operator value);

35. Combination of AND & OR Operators
Demo Database
StudentId StudentName Course Section
13103007 Bithi Akter CSC433 D
13103010 Sanjida Tasnim CSC434 E
13103013 Shohana Akter CSC434 D

36. Combination of AND & OR Operators
Combination AND & OR Operators Column Example
The following SQL statement selects all students from the CourseNo “CSC434"
AND the StudentId must be equal to “13103013" OR the Section must be equal to
“E", in the “Students" table:
The Practical Output

37. Any
Question?