1.What is an Equi Join in SQL? An Equi Join is a type of SQL join that combines rows from two or more tables based on a condition that checks for equality between specified columns. This join uses the equality operator = to match column values across tables. 2.Why are SQL Equi Joins...
Multi-table Queries 12: The Cross Join 4:01 13: The Equi-Join 3:57 14: The Natural Join 2:36 15: The Condition Join 2:37 16: The Column Name Join 2:50 17: The Inner Join 2:49 18: The Outer Join 7:44 19: The Self Join 3:53 ...
Even though in this join condition, we are matching column for column, first name in one table to first name in another, last name in one table to last name in another, we are making sure that the business entity ID in one table does not equal the business entity ID in another table....
For the alignment grouping operation, each group will contain all matching members in the to-be-grouped set. Since SQL does not directly support this type of grouping, we group EMPLOYEE table by department and count employees in each department, perform a left join between DEPARTMENT table and ...