What is Inner Joints and Outer Joints ?
What is right outer joints,left outer joints,right inner
joints , left inner joints ,
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Answer / sunil kumar
Inner join=>Inner join returns rows when there is at least
one match in both tables.
Outer Join=> Outer Join returns the set of all matching
records from both tables. Outer join doesn`t require each
record to be matched in both the tables.
Right Outer Join=>Return all the rows of second table ,plus
matching record of both tables.
Left Outer Join=>Return all the rows of first table,plus
matching record of both tables.
| Is This Answer Correct ? | 26 Yes | 0 No |
Answer / muthuk
Outer Join=> Outer Join returns the set of all matching
records from both tables. Outer join doesn`t require each
record to be matched in both the tables.
Inner join=>Inner join returns rows when there is at least
one match in both tables.
Left Outer Join=>Return all the rows of first table,plus
matching record of both tables.
Right Outer Join=>Return all the rows of second table ,plus
matching record of both tables.
| Is This Answer Correct ? | 5 Yes | 1 No |
Which one of the following is the correct way to select all columns and all rows from "vtable"? Choice 1 SELECT FROM vtable SELF JOIN vtable Choice 2 SELECT ALL COLUMNS FROM vtable WHERE ALL ROWS = * Choice 3 SELECT EVERYTHING FROM vtable Choice 4 SELECT vtable.* WHERE vtable = vtable Choice 5 SELECT * FROM vtable WHERE 1 = 1
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