Change a table cell data in mysql -


I failed to know how to change any particular cell data in a mysql database table. For example:

There are 3 tables in the MyDB database "Table 1" "Table 2" "Table 3" etc.

Table 3 has 3 columns: ID | Title | Timeline: Multiple rows in each column (content is prepared) 

  "Table3" id. Title | Deadline 1 | ABC | 30 2 Def | 45 3 Too. 30   
 etc.  
 Then, let me change from  30  to  60  to  deadline  ou  line ID 3 Is , how can I do this?  
 When I type  update table 3 set deadline = '60' where 30 is the time limit  
 Roman          
 
 
 3, then in that section, specify in which section    update table 3 set deadline = 60 where id = 3;

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