How to execute db2 query from a unix shell script

[sohan]

Hi,

I want to know how to connect and execute a db2 query from inside a
UNIX shell script.

Details: We have a unix shell script. We need to execute multiple db2
sql queries from this shell script and export the result to a file.

Any code snippet on this will be helpful.

Thanks,
Sohan

[Brian Tkatch]

sohan wrote:

Hi,

I want to know how to connect and execute a db2 query from inside a
UNIX shell script.

Details: We have a unix shell script. We need to execute multiple db2
sql queries from this shell script and export the result to a file.

Any code snippet on this will be helpful.

Thanks,
Sohan

db2 <command>

Most likely, you want to quote the command.

To see how to export to a file, strip headers, or the like, see the
Command Reference, and the list of options.

B.

[sohan]

THanks Brian.

So now I have written the following shell script to connect to a db2
database and execute a query. Is there any better way / alternate way
of doing this?

#!/usr/bin/ksh

db2 +t connect to <dbname>;

SQLSTMT=/tmp/$0.$$.tmp
echo $SQLSTMT
cat <<EOF $SQLSTMT
set schema ADMIN;
EXPORT TO x.unl OF DEL MODIFIED BY NOCHARDEL

select * from store;
EOF
db2 -txf $SQLSTMT
echo $?

Thanks,
Sohan
P.S. I am new to db2 and UNIX.

Brian Tkatch wrote:

sohan wrote:

Hi,

I want to know how to connect and execute a db2 query from inside a
UNIX shell script.

Details: We have a unix shell script. We need to execute multiple db2
sql queries from this shell script and export the result to a file.

Any code snippet on this will be helpful.

Thanks,
Sohan

db2 <command>

Most likely, you want to quote the command.

To see how to export to a file, strip headers, or the like, see the
Command Reference, and the list of options.

B.

[Knut Stolze]

sohan wrote:

THanks Brian.

So now I have written the following shell script to connect to a db2
database and execute a query. Is there any better way / alternate way
of doing this?

#!/usr/bin/ksh

db2 +t connect to <dbname>;

SQLSTMT=/tmp/$0.$$.tmp
echo $SQLSTMT
cat <<EOF $SQLSTMT
set schema ADMIN;
EXPORT TO x.unl OF DEL MODIFIED BY NOCHARDEL

select * from store;
EOF
db2 -txf $SQLSTMT
echo $?

Looks good. You probably want to remove the temp file afterwards, though.

If your SQL statements are not too complex, you can also do this:

#!/bin/sh

db2 "CONNECT TO <dbname>"

db2 "SET SCHEMA = admin"
db2 "EXPORT TO x.unl OF DEL MODIFIED BY NOCHARDEL SELECT * FROM store"

--
Knut Stolze
DB2 z/OS Utilities Development
IBM Germany

[Brian Tkatch]

sohan wrote:

THanks Brian.

So now I have written the following shell script to connect to a db2
database and execute a query. Is there any better way / alternate way
of doing this?

#!/usr/bin/ksh

db2 +t connect to <dbname>;

SQLSTMT=/tmp/$0.$$.tmp
echo $SQLSTMT
cat <<EOF $SQLSTMT
set schema ADMIN;
EXPORT TO x.unl OF DEL MODIFIED BY NOCHARDEL

select * from store;
EOF
db2 -txf $SQLSTMT
echo $?

Thanks,
Sohan
P.S. I am new to db2 and UNIX.

Brian Tkatch wrote:

sohan wrote:

Hi,
>
I want to know how to connect and execute a db2 query from inside a
UNIX shell script.
>
Details: We have a unix shell script. We need to execute multiple db2
sql queries from this shell script and export the result to a file.
>
Any code snippet on this will be helpful.
>
Thanks,
Sohan

db2 <command>

Most likely, you want to quote the command.

To see how to export to a file, strip headers, or the like, see the
Command Reference, and the list of options.

B.

Instead of cat to a file and running the file, the statement itself can
be used:

db2 -txf <<EOF $SQLSTMT
set schema ADMIN;
EXPORT TO x.unl OF DEL MODIFIED BY NOCHARDEL select * from store;
EOF

Of course, if only one statement is used, the SET SCHEMA is extraneous,
and the schema could be mentioned as part of the TABLE name. This would
make it one statement, and obviate the need for a here-document.

db2 -tx "EXPORT TO x.unl OF DEL MODIFIED BY NOCHARDEL select * from
ADMIN.store;"

Of course, the asterisk may then cause globbing issues, so it needs to
be escaped, or the statement needs to be quoted. Further, with one
statement, the semi-colon is redundant, making the most efficient
statement:

db2 -x EXPORT TO x.unl OF DEL MODIFIED BY NOCHARDEL select \* from
ADMIN.store

If you are looking to automate exporting and loading multiple TABLE, i
just wrote a script to do that (with some very kind help from this
newsgroup).

B.

[Hemant Shah]

print -R "CONNECT TO ${DB2DBDFT};
DROP TABLE ${SCHEMANAME}.TABLE1;
DROP TABLE ${SCHEMANAME}.TABLE2;
DROP TABLE ${SCHEMANAME}.TABLE3;
TERMINATE;" | db2 +p -t

While stranded on information super highway sohan wrote:

Hi,

I want to know how to connect and execute a db2 query from inside a
UNIX shell script.

Details: We have a unix shell script. We need to execute multiple db2
sql queries from this shell script and export the result to a file.

Any code snippet on this will be helpful.

Thanks,
Sohan

--
Hemant Shah /"\ ASCII ribbon campaign
E-mail: No************@xnet.com \ / ---------------------
X against HTML mail
TO REPLY, REMOVE NoJunkMail / \ and postings
FROM MY E-MAIL ADDRESS.
-----------------[DO NOT SEND UNSOLICITED BULK E-MAIL]------------------
I haven't lost my mind, Above opinions are mine only.
it's backed up on tape somewhere. Others can have their own.

[Knut Stolze]

Hemant Shah wrote:

>

print -R "CONNECT TO ${DB2DBDFT};

You should have pointed out that "print" is not necessarily a regular Unix
and/or shell command.

DROP TABLE ${SCHEMANAME}.TABLE1;
DROP TABLE ${SCHEMANAME}.TABLE2;
DROP TABLE ${SCHEMANAME}.TABLE3;
TERMINATE;" | db2 +p -t

--
Knut Stolze
DB2 z/OS Utilities Development
IBM Germany

[sohan]

Thanks for all the responses.
One more question, to connect to a db2 database in the same UNIX server
we can use:

db2 connect to <dbnameUSer <nameusing <pwd>

Now if the db2 server is in differrent server where/how do we specify
the server name or its ip address?

Thanks,
Sohan
Knut Stolze wrote:

Hemant Shah wrote:

print -R "CONNECT TO ${DB2DBDFT};

You should have pointed out that "print" is not necessarily a regular Unix
and/or shell command.

DROP TABLE ${SCHEMANAME}.TABLE1;
DROP TABLE ${SCHEMANAME}.TABLE2;
DROP TABLE ${SCHEMANAME}.TABLE3;
TERMINATE;" | db2 +p -t

--
Knut Stolze
DB2 z/OS Utilities Development
IBM Germany

[Ian]

sohan wrote:

Now if the db2 server is in differrent server where/how do we specify
the server name or its ip address?

That is configured when you catalog the database (i.e. the DB2 client
must be installed on the machine)

[Hemant Shah]

Sorry about that, I should have mentioned that it is a Korn shell command.

While stranded on information super highway Knut Stolze wrote:

Hemant Shah wrote:

>>

print -R "CONNECT TO ${DB2DBDFT};

You should have pointed out that "print" is not necessarily a regular Unix
and/or shell command.

>DROP TABLE ${SCHEMANAME}.TABLE1;
DROP TABLE ${SCHEMANAME}.TABLE2;
DROP TABLE ${SCHEMANAME}.TABLE3;
TERMINATE;" | db2 +p -t

--
Knut Stolze
DB2 z/OS Utilities Development
IBM Germany

--
Hemant Shah /"\ ASCII ribbon campaign
E-mail: No************@xnet.com \ / ---------------------
X against HTML mail
TO REPLY, REMOVE NoJunkMail / \ and postings
FROM MY E-MAIL ADDRESS.
-----------------[DO NOT SEND UNSOLICITED BULK E-MAIL]------------------
I haven't lost my mind, Above opinions are mine only.
it's backed up on tape somewhere. Others can have their own.