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SQL: Find those employees whose last name is Dosni or Mardy

SQL Boolean Operator Statement: Exercise-11 with Solution.

From the following table, write a SQL query to find the details of all employees whose last name is ‘Dosni’ or ‘Mardy’. Return emp_idno, emp_fname, emp_lname, and emp_dept.

Sample table : emp_details


Sample Solution :

SELECT * 
 FROM emp_details
  WHERE emp_lname ='Dosni' OR emp_lname= 'Mardy';

Output of the Query:

emp_idno	emp_fname	emp_lname	emp_dept
444527		Joseph		Dosni		47
539569		George		Mardy		27

Relational Algebra Expression:

Relational Algebra Expression: Find those employees whose last name is Dosni or Mardy.

Relational Algebra Tree:

Relational Algebra Tree: Find those employees whose last name is Dosni or Mardy.

Practice Online


Query Visualization:

Duration:

Query visualization of Find those employees whose last name is Dosni or Mardy - Duration

Rows:

Query visualization of Find those employees whose last name is Dosni or Mardy - Rows

Cost:

Query visualization of Find those employees whose last name is Dosni or Mardy - Cost

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Previous: Write a SQL query to display order number, purchase amount, achived, the unachieved percentage for those order which exceeds the 50% of the target value of 6000.
Next: From the following table, write a SQL query to find the employees who works at depart 47 or 63. Return emp_idno, emp_fname, emp_lname, and emp_dept.

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SQL: Tips of the Day

SQL Server SELECT into existing table. 

INSERT INTO dbo.TABLETWO
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

This assumes there's only two columns in dbo.TABLETWO - you need to specify the columns otherwise:

INSERT INTO dbo.TABLETWO
  (col1, col2)
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

Database: SQL Server

Ref: https://bit.ly/3y6tpA3