What is Join..?? Explain different types of joins.

Engineering

1 answer:

Anarel [89]3 years ago

5 0

Answer:

mainly used to combine two tables based on a specified common field between them. If we talk in terms of Relational algebra, it is the cartesian product of two tables followed by the selection operation. Thus, we can execute the product and selection process on two tables using a single join statement. We can use either 'on' or 'using' clause in MySQL to apply predicates to the join queries.

A Join can be broadly divided into two types:

Inner Join

Outer Join

Inner Join is a join that can be used to return all the values that have matching values in both the tables. Inner Join can be depicted using the below diagram.

The inner join can be further divided into the following types:

Equi Join

Natural Join

Now let us learn about these inner joins one-by-one.

You might be interested in

The sharpest bend that can be placed in a piece of metal without critically weakening the part is called the?

Bogdan [553]

Answer:

minimum radius of bend.

Explanation:

The sharpest bend that can be placed in a piece of metal without critically weakening the part is called the minimum radius of bend.

3 0

2 years ago

It is well established that the thermal efficiency of a heat engine increases as the temperature TL at which heat is rejected fr

USPshnik [31]

Answer: No, not in favor of the idea.

This is because, an increase in the refrigerator's work output is equal to work input. In real live application, the work input of the refrigerator is always greater than the additional work output. This will result to reducing the efficiency of the power plant.

7 0

3 years ago

Which place does “ the home of your ancestors”? refer to?What is jada response to nia and emily disapproval

sp2606 [1]

The place that does “ the home of your ancestors” refer to is Cobo Verde.