Alter table to add index : Alter Table « Table Index « SQL / MySQL






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Alter table to add index

     
mysql>
mysql> CREATE TABLE mytable (
    ->     titleID INT NOT NULL AUTO_INCREMENT,
    ->     publID INT,
    ->     PRIMARY KEY  (titleID)
    -> );
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql>
mysql> ALTER TABLE mytable ADD INDEX idxtitle (publID);
Query OK, 0 rows affected (0.01 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql>
mysql> drop table mytable;
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql>








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33.Specifying Multiple Alterations
34.Alter table to add an index
35.Alter table to add unique index
36.Alter table to Delete an Index
37.To drop an index with ALTER TABLE
38.Reduce the number of significant characters per index in the index to the first 16 characters
39.Add IGNORE to the statement, then use SELECT to have a look at the table contents to see how the duplicates ha
40.Change j from INT to BIGINT
41.MODIFY statement should specify the null and default value attributes explicitly
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