How we can do DB connection in shell script?

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Hello,

I am writting a shell script, which handles DB(Oracle) table operations (create, update, alter, insert etc...)
For each operation I had written seperate shell script function.
Could you please tell me that, it is necessary to connect to oracle in every function with below line?

sqlplus -s scott/tiger << EOF

Please tell me the scope of this DB connection is functionwise or its overall to the script?

I had written a DB_Connection function with this statement and other functions are getting called from main function in script.
Main function includes DB_connection, Create_Table, inser_rows etc...functions.

So is it necessary to write this line in every function before writting any DDL statement.
E.g.
sqlplus -s scott/tiger << EOF
Select * from <table_name>
exit
EOF

Thanks in advance. :-O

Posted 16-Sep-10 21:04pm

Poonamol

Updated 16-Sep-10 21:06pm

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Sergey Alexandrovich Kryukov 27-Mar-13 18:14pm

Shell script?! Why on Earth would you want it?
—SA

Prasad Khandekar 27-Mar-13 21:44pm

I think Oracle must have been deployed on a *NIX platform, which is any way a preferred platform for Oracle. So shell scripts are best friends on these platforms.

Sergey Alexandrovich Kryukov 27-Mar-13 23:17pm

Well, yes, on *NIX it's more usual; I just did not think it's *NIX...
—SA

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Prasad Khandekar · Answer 1 · 2013-03-27T15:42:00

Hello Poonam,

The lines between <<EOF and EOF tags denotes the SQL commands being piped into the SQLPlus executable. Have a look at this[^] article. It's not like a Database Connection available in most of the programming languages which you open once and reuse everywhere, It's a pipe command.

Regards,