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An INNER JOIN between two tables means that the joining values have to be present in both tables, while an FULL JOIN means that the values can be in either of the two tables. This is also know as a FULL OUTER JOIN.
As an example, imagine a customer table with a code,name and type and an auxiliary table with a type id and type description;
select * from Customer
1 Record One 001
2 Number 2 001
3 The third 002
Select * from CustomerType
001 Type_one
003 Another One
(you'll notice that the type code '002' is missing).
select Customer.Name, Customer.TypeCode, TypeCode.Description from Customer INNER JOIN CustomerType on (CustomerType.Code = Customer.TypeCode)
Record One 001
Number 2 001
(The third record is missing because there wasn't a corresponding value in the CustomerType table for the inner join)
select Customer.Name, Customer.TypeCode, TypeCode.Description from Customer FULL JOIN CustomerType on (CustomerType.Code = Customer.TypeCode)
Record One 001
Number 2 001
The third 002
(Which works because of the FULL - aka OUTER - JOIN)
What else can I help you with?
What is the difference between join and inner join?
One is inner the other is not... Plum
State the basic difference between Inner join and Left Outer Join?
Inner join is from the inside while left out join is from the outside
Do you have inner join command in oracle?
yes, we do have inner join command in oracle. Inner Join is used to combine related tuples from two relations.It allows to evaluate a join condition between attributes of the relations on which join is undertaken .
Difference between Full Penetration weld Deep Penetration weld?
The difference between a full penetration weld and a deep penetration weld is the depth at which the metals being joined are actually joined. A full penetration weld is a slight puncture only to heat the two metals and join them. A deep penetration weld is a deeper hole puncture that is held and a metal wire is melted to join the metals.
Which SQL join will be fast. Inner Join or Left Join or Right Join or Self Join?
Left Inner Join will be faaster
Types of Joints in database?
In databases, the main types of joins are inner join, outer join, left join, right join, and full outer join. An inner join returns only the rows with matching values in both tables, while outer joins include rows with unmatched values. A left join returns all rows from the left table and matched rows from the right, whereas a right join does the opposite. Full outer join combines the results of both left and right joins, including all rows from both tables.
Difference between cartesian product and full outer join?
Full outer join will fetch at maximum 'addition of 2 tables' Ex: Table A - 2 rows; Table B - 3 rows. Full outer join will fetch in 2+3 = 5 rows. Where as in Cartesian product will fetch in 'product of 2 tables'. Ex: Table A - 2 rows; Table B - 3 rows. Full outer join will fetch in 2x3 = 6 rows
What is the default join in Microsoft access?
inner join
How do you join more than 3 tables?
In SQL you just keep adding JOINs; select * from Table1 inner join Table2 on (Table2.key = Table1.Key) inner join Table3 on (Table3.key = Table1.Key) inner join Table4 on (Table4.key = Table1.Key) inner join Table5 on (Table5.key = Table1.Key) inner join Table6 on (Table6.key = Table1.Key) and so on.
What is the most common type of join in SQL?
Inner Join
What is inner join in sql server 2000?
Inner join refers to the join where records that match the where condition in both tables are only fetched. Ex: SELECT A.field1, A.field2, B.field3, B.field4 FROM Table1 A, Table2 B WHERE A.field1 = B.field3 This is an inner join.
Difference between select and inner join?
The select command is the mechanism for retrieving records from a SQL database. In it's simplest form, this would be FROM a single table, for example - select * from CustomerTable.When data is needed from multiple tables, each pair of tables has to be linked together using a JOIN. The easiest type of join is an INNER JOIN, which expects the data to be in both tables. For example, if a customer record had a 'STATE' code which looked up against the US States and we want our SELECT to return the State name as well as the customer code, it would look something like this;SELECT CustomerCode, CustomerName, StateName FROM Customer INNER JOIN State on (State.ID = Customer.StateCode)
