UNION and UNION ALL - Edubirdie

University:
American Baptist College
Course:
CSCI 1534 | Data Analysis and Visualization
Academic year:

2023
Views:

42

Pages:

2
Author:

Muthia M.

Data Retrieval UNION UNION clause/operator is used to combine the results of two or more SELECT statements without returning any duplicate rows. In SQL, when you use UNION, it takes the results from two SELECT queries and puts them together into one list, making sure there are no repeated values in the final list. SELECT column_1, column_2 FROM table_1 [WHERE condition] UNION SELECT column_1, column_2 FROM table_2 [WHERE condition] Data Retrieval UNION ALL Command combines the result set of two or more SELECT statements (allows duplicate values). In SQL, UNION ALL is like an upgraded version of UNION. While UNION only gives you unique values from two tables, UNION ALL gives you everything, including duplicates. It combines the results of multiple SELECT queries, showing all the values, even if they're repeated. SELECT column_names FROM table_1 WHERE conditions UNION ALL SELECT column_names FROM table_2 WHERE conditions;

Related Documents

UNION and UNION ALL

UNION and UNION ALL - Page 1

UNION and UNION ALL - Page 2

of 2

Recommended Documents

ITS Databases Practice Exam 25

ITS Databases Practice Exam 25

American Baptist College CSCI 1534 | Data Analysis and Visualization

Assignment

New Documents from this Course

Python Practice #5

Python Practice #5

American Baptist College CSCI 1534 | Data Analysis and Visualization

Assignment

Python Practice #4

Python Practice #4

American Baptist College CSCI 1534 | Data Analysis and Visualization

Assignment

Input and Output Operation in Python

Input and Output Operation in Python

American Baptist College CSCI 1534 | Data Analysis and Visualization

Lecture Note

Python Data Operator (Assignment Operators and Comparison Operators)

Python Data Operator (Assignment Operators and Comparison Operators)

American Baptist College CSCI 1534 | Data Analysis and Visualization

Lecture Note

Operations using Data Types and Operators in Python

Operations using Data Types and Operators in Python

American Baptist College CSCI 1534 | Data Analysis and Visualization

Lecture Note

Intersect, Distinct, Alias, Computed Column and Sort

Intersect, Distinct, Alias, Computed Column and Sort

American Baptist College CSCI 1534 | Data Analysis and Visualization

Lecture Note

Flow Control with Iteration (While Statement and For Statement)

Flow Control with Iteration (While Statement and For Statement)

American Baptist College CSCI 1534 | Data Analysis and Visualization

Lecture Note

Aggregate in Database

Aggregate in Database

American Baptist College CSCI 1534 | Data Analysis and Visualization

Lecture Note

Data Protection Measures

Data Protection Measures

American Baptist College CSCI 1534 | Data Analysis and Visualization

Lecture Note

Datamart to Looking for the Profit Every Month

Datamart to Looking for the Profit Every Month

American Baptist College CSCI 1534 | Data Analysis and Visualization

Assignment