what is difference between alter and update command?

 

what is difference between alter and update command?

Alter command	Update command
1-Alter command belongs to DDL. 2-Alter command is used to modify existing table header. Example- i-Adding new column. ii-Dropping Exiting column. iii-Renaming the exiting column. iv-Change the data type and size. 3-Alter command does not support where conditions.	1-Update command belong from DML. 2-Update command is used to modify the Existing table body.  Example- i-change the values. ii-Rename exiting values.   3-Update commands supports where conditions.