SQL JOINS

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SQL JOINS

Inner Join

Outer Join

Cross Join

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SQL JOINS

I.INNER JOIN

Inner join returns only those records that match in both the tables.

Syntax:Select * from table 1 INNER JOIN table 2ONTable 1.Column 1=table 2.Column 1

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SQL JOINS

Select * from CountryStatusInner Join PRODUCTSONCountryStatus.ProductID=PRODUCTS.ProductID

Result:

QUARY:

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SQL JOINS

II.OUTER JOIN

Outer Joins are three typesa. Right Outer Joinb. Left Outer Joinc. Full Outer join

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SQL JOINS

a. Right Outer Join

Right outer join returns all records/rows from right table and from left tablereturns only matched records.

Syntax:

Select * from Table 1Right Outer Join Table 2ONTable 1.Column 1=Table 2.Column 1

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SQL JOINS

QUARY:

Select * from CountryStatusRight Outer Join PRODUCTSONCountryStatus.ProductID=PRODUCTS.ProductID

RESULT:

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SQL JOINS

b. Left Outer Join

Left outer join returns all records/rows from left table and from right table returns only matched records.

Syntax:

Select * from Table 1Left Outer Join Table 2ONTable 1.Column 1=Table 2.Column 1

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SQL JOINS

RESULT:

QUARY:Select * from CountryStatusLeft Outer Join PRODUCTSONCountryStatus.ProductID=PRODUCTS.ProductID

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SQL JOINS

c. Full Outer Join

Full outer join combines left outer join and right outer join. This join returns all records/rows from both the tables.

Syntax:

Select * from Table 1Full Outer Join Table 2ONTable 1.Column 1=Table 2.Column 1

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SQL JOINS

QUARY:

Select * from CountryStatusFull Outer Join PRODUCTSONCountryStatus.ProductID=PRODUCTS.ProductID

RESULT:

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SQL JOINS

III. Cross Join

This join returns records/rows that are multiplication of record number from both the tables means each row on left table will related to each row of right table.

Syntax:

Select * from Table 1Cross Join Table 2

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SQL JOINSQUARY:

Select * from CountryStatusCross Join PRODUCTS

RESULT:

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