Auto Increment id in Mysql

Bart — Tue, 23 Feb 2010 10:49:03 +0000

There is a structure of a table with an auto-increment ID.Last inserted id is 2145. What will be the next ID after following conditions?
- Delete from tablename?
- Delete from tablename where ID=”2145″
- truncate table tablename

2146, 2146, 1

Sql Join Operations

Bart — Tue, 23 Feb 2010 10:49:03 +0000

What is the difference between inner join and outer join?

Simply, inner join gives both table’s common fields and outer join gives uncommon fields.

Inner join
SELECT CUSTOMERS.NAME, ORDERS.NAME
FROM CUSTOMERS
INNER JOIN ORDERS
ON CUSTOMERS.ID = ORDERS.CUSTOMER_ID

Outer join
SELECT CUSTOMERS.NAME, ORDERS.NAME
FROM CUSTOMERS
LEFT JOIN ORDERS
ON CUSTOMERS.ID = ORDERS.CUSTOMER_ID

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Auto Increment id in Mysql

Sql Join Operations