Where conditions and Operators in SQL
- 2. msbacademy.org Where Clause 1. Where 2. AND 3. OR 4. Like
- 3. msbacademy.org Where Clause Where Clause is used to extract only those records that satisfied the given condition, like fetch only those student record which has more than 75 marks
- 4. msbacademy.org When use where clause ? 1. To retrieve the only specific record 2. To delete the only specific record 3. To update only specific record
- 5. msbacademy.org Operators in The WHERE Clause 1. = 2. <> 3. > 4. < 5. >= 6. <= 7. BETWEEN 8. LIKE 9. IN 10.NOT
- 6. msbacademy.org Syntax SELECT column_name,column_name FROM table_name WHERE column_name operator value; Ex: SELECT * from student WHERE marks>75;
- 7. msbacademy.org And Clause And clause is used to combine two or more than two conditions together. In this case, you need must be true both condition then return the result otherwise it won’t return any result. Suppose you want to get only students records who have more than 75 marks and CSE branch in that case you can combine these two conditions by using AND clause.
- 8. msbacademy.org Syntax SELECT columns FROM table_name WHERE condition 1 AND condition 2; Ex: SELECT * from student WHERE marks>75 AND branch=‘cse’;
- 9. msbacademy.org OR Clause OR clause is used to combine two or more than two conditions together, In this case, you need at least one condition must true then only it will return the result. Suppose you want to get only those students records who have more than 75 marks or CSE branch in that case you can be combine these two conditions by using OR clause.
- 10. msbacademy.org Syntax SELECT columns FROM table_name WHERE condition 1 OR condition 2; Ex: SELECT * from student WHERE marks>75 OR branch=‘cse’;
- 11. msbacademy.org Not Operator The NOT operator retrieves a records if the condition(s) is NOT TRUE
- 12. msbacademy.org Syntax SELECT column1, column2, ... FROM table_name WHERE NOT condition; Ex: SELECT * FROM student WHERE NOT Country=‘usa';
- 13. msbacademy.org Like Operator Like Operator is used in a WHERE clause to search for a specified pattern in a column. Suppose you want to search those students records whose names starts with M alphabet.
- 14. msbacademy.org Syntax SELECT column_name FROM table_name WHERE column_name LIKE pattern; Ex: SELECT * FROM student WHERE student_name LIKE ‘m%';
- 15. msbacademy.org LIKE operators with '%' and '_‘Wildcard Characters LIKE Operator Description WHERE student_name LIKE ‘ra%' Finds any values that starts with “ra" WHERE student_name LIKE '%ra' Finds any values that ends with “ra" WHERE student_name LIKE '%sr%' Finds any values that have “sr" in any position WHERE student_name LIKE '_m%' Finds any values that have “m" in the second position WHERE student_name LIKE ‘e_%_%' Finds any values that starts with “e" and are at least 3 characters in length WHERE student_name LIKE ‘s%d' Finds any values that starts with “s" and ends with “d"
- 16. msbacademy.org Between Operator 1. BETWEEN returns values that fall within a given range. 2. BETWEEN is a shorthand for >= AND <=. 3. BETWEEN operator is inclusive: begin and end values are included.
- 17. msbacademy.org Syntax SELECT column-names FROM table-name WHERE column-name BETWEEN value1 AND value2; Ex: SELECT * FROM student WHERE marks BETWEEN 60 AND 75;
- 18. msbacademy.org IN operator The IN operator allows you to specify multiple values in a WHERE clause. The IN operator is a shorthand for multiple OR conditions
- 19. msbacademy.org Syntax SELECT column_name(s) FROM table_name WHERE column_name IN (value1, value2, ...); Or SELECT column_name(s) FROM table_name WHERE column_name IN (SELECT STATEMENT);
- 20. msbacademy.org IN operator Examples SELECT * FROM student WHERE Country IN (‘india', ‘usa', ‘china'); Or SELECT * FROM student WHERE Country IN (SELECT Country FROM employee);