Auto_ increment is used to increase by 1 while insert a new data to mysql table. The auto increment column must be def...

                       You created a table in which the column with 'NOT NULL'. Suppose you want to change mysql column definition ...

                       You created a table with column in specific datatype. Sometimes you need to change datatype of column. At the time...

                       You created a table with specific size of column. Sometimes you need to increase the size of column, if the size is ...