Join vs union

Difference between join vs union

JOIN combines the ROWs, we will have longer rows at the end. 
We are joining the rows from two or more related tables.

UNION combines the COLUMNs, we will have longer columns at the end.
UNION combine two different query.
We are joining the columns from two or more related tables.
Can be non related tables but queries must select same column names
with same data type.

Join vs union

JOIN combines the ROWs, we will have longer rows at the end. 
We are joining the rows from two or more related tables.

UNION combines the COLUMNs, we will have longer columns at the end.
UNION combine two different query.
We are joining the columns from two or more related tables.
Can be non related tables but queries must select same
column names with same data type.

Similar codes

0 vote178 views1 answer
Migrations.RunSQL
SQL
0 vote138 views1 answer
Copy value from one column to another postgres
SQL
0 vote129 views1 answer
Date diff sql
SQL
2 votes135 views1 answer
Possgress drop if exists table
SQL
5 votes163 views1 answer
Oracle columns in all_tables
SQL
0 vote162 views1 answer
Influxdb list all tags for a measurement
SQL
2 votes138 views2 answers
Maximum execution time of 360 seconds exceeded
SQL
0 vote123 views3 answers
Sql count condition
SQL
0 vote130 views1 answer
C# mysql data reader from two tables
SQL
3 votes131 views3 answers
Django.db.utils.OperationalError: no such table:
SQL