An SQL join clause combines records from two or more tables in a database. ANSI standard SQL specifies four types of JOINs: INNER, OUTER, LEFT, and RIGHT. Since SQL joins appear to be set-based, its easy to explain using Venn diagrams.
LEFT OUTER JOIN: produces a complete set of records from Table A, with the matching records (where available) in Table B. If there is no match, the right side will contain null.
RIGHT OUTER JOIN: produces a complete set of records from Table B, with the matching records (where available) in Table A. If there is no match, the left side will contain null.
FULL OUTER JOIN: produces the set of all records in Table A and Table B, with matching records from both sides where available. If there is no match, the missing side will contain null.
INNER JOIN: produces only the set of records that match in both Table A and Table B.
SQL Joins made simple.. Thanks
Nice post. I learn something more challenging on completely different blogs everyday. It would all the time be stimulating to read content from different writers and practice a little bit something from their store.Thanks for sharing
Really visual explnation
Your place is valueble for me. Thanks!
best article ever
I simply wanted to say thanks all over again.
Perfect explanation
I enjoy you because of all your efforts on this web page.