Six: Modify the table structure

Modify table structure

Syntax:
 1 . Modify table
       the ALTER  TABLE table name 
                      RENAME new name; 

2 increase the field.
       The ALTER  TABLE table name
                       ADD Field Name Data Type [ integrity constraints ... ] ,
                       ADD Field Name Data Type [ integrity constraints ... ] ; 
                            
3 . remove field
       the ALTER  tABLE table 
                       DROP field name; 

4 . editable field
       the ALTER  tABLE table 
                      mODIFY field name data type [ integrity constraints ... ];
       The ALTER  TABLE table name 
                      CHANGE old name for the new field name field type old data [ integrity constraints ... ] ;
       the ALTER  TABLE table name 
                      CHANGE old name for the new field name field new Data Type [ integrity constraints ... ] ; 

5 . Editable field arrangement order / increase in the time designating field position
     the ALTER  tABLE table name
                      ADD field name data type [ integrity constraints ... ]   FIRST;
     the ALTER  tABLE table name
                      ADD field name data type [ integrity constraints ... ]   an AFTER field name;
     the ALTER TABLE table name 
                     CHANGE field name field name New Old New Data Type Field Name [ integrity constraints ... ]   FIRST;
     the ALTER  TABLE table 
                     MODIFY Field Name Data Type [ integrity constraints ... ]   an AFTER field name;

Meet to come to, less than basic, but also change with graphical interface.