Execute Oracle SQLs from Linux Command Prompt and Exit

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Method 1 

Execute single SQL command from the prompt

[oracle@TESTBOX exp]$ echo 'select count(*) from tab;' | sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Fri Jul 17 07:46:47 2020
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0

SQL> 
  COUNT(*)
----------
      8308

SQL> Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0

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Method 2 
Execute multiple SQL statements using .sql script

$ cat test.sql
select 1 from dual;
select name from v$database; 
select count(*) from tab;

sqlplus / as sysdba @test.sql
sqlplus test/test @test.sql

To exit from the sql prompt either you have to put exit in the .sql file or use below command.

exit | sqlplus / as sysdba @test.sql

Demo:-

$ exit | sqlplus / as sysdba @test.sql

SQL*Plus: Release 19.0.0.0.0 - Production on Fri Jul 17 07:54:56 2020
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0


	 1
----------
	 1


NAME
---------
CDB


  COUNT(*)
----------
      8308

SQL> Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0

Method 3

sqlplus /nolog <<EOF
connect test/test
@ test.sql 
select * from dual;
EOF

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