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Hi,

I am currently working in Support in UNIX. my exp is 3years. i have planned to change my carrer to TETING domain. pls let me know ur thoughts.

Hi,

you can first store the o/p of wc -l value in a variable.

say a = wc -l /tmp/file.

then b=`expr $a/2`

Thanks.

Hi,

The Syntax remains the same to add or drop a column.

Alter table <tablename> add/drop column <columnname>

we cannot drop a computed column.

Thanks