SQL exercises on movie Database: Find the name of all reviewers who have rated their ratings with a NULL value

Last update on May 30 2022 07:11:56 (UTC/GMT +8 hours)

SQL movie Database: Join Exercise-1 with Solution

1. From the following tables, write a SQL query to find the name of all reviewers who have rated their ratings with a NULL value. Return reviewer name.

Sample table: reviewer

Sample table: rating

Sample Solution:

SELECT rev_name
FROM reviewer
INNER JOIN rating USING(rev_id)
WHERE rev_stars IS NULL;

Sample Output:

            rev_name
--------------------------------
 Neal Wruck
 Scott LeBrun
(2 rows)

Relational Algebra Expression:

Relational Algebra Tree:

Practice Online

Query Visualization:

Duration:

Rows:

Cost:

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Next: From the following tables, write a SQL query to find the actors who were cast in the movie 'Annie Hall'. Return actor first name, last name and role.

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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