UNION The UNION operator combines two sets by adding all records from the left set to the results of the right set. Example: sql SELECT FROM table1 UN...
UNION
The UNION operator combines two sets by adding all records from the left set to the results of the right set.
Example:
sql
SELECT * FROM table1
UNION SELECT * FROM table2;
INTERSECT
The INTERSECT operator finds the records that are common to both sets.
Example:
sql
SELECT * FROM table1
INTERSECT SELECT * FROM table2;
EXCEPT
The EXCEPT operator finds the records that are in the results of the left set but not in the results of the right set.
Example:
sql
SELECT * FROM table1
EXCEPT SELECT * FROM table2;
These set operations are useful for manipulating sets of data and extracting meaningful information from them. They are particularly useful when you need to combine data from multiple sources, find common items, or identify differences between sets