Locking the tables

[Binay]

Hi all,

I have mysql verison 3.23.58 and all tables in a database say test_database are of 
MyIsam types.

I want to put write lock on a(set of) table(s), so that only i can insert into it and 
no body else unless i remove the write lock. How can i achieve it??

Please help me out ..

Thanks in advance 

Binay