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Full Discussion: Two databases
Top Forums Shell Programming and Scripting Two databases Post 302542319 by Nitrodist on Wednesday 27th of July 2011 08:24:28 AM
Old 07-27-2011
Quote:
Originally Posted by itkamaraj
Code:
select * from 1.employee
minus 
select * from 2.employee

What kind of SQL syntax is 'minus' ?

Anjali, you're probably looking for a JOIN between the tables.

To answer your question as to the same column name being in both tables, you have to fully qualify each column if their names are shared (actually, it's a good idea to fully qualify with the abbreviated name at this point).

So, if you had two tables, such as Student and Student_Grades, both which had a Student_ID column, you would qualify it as Student.Student_ID and Student_Grades.Student_ID.

The wikipedia article that I linked has a good example of JOINs and the qualified naming that you have to do (in their example, it's an employee and their department).
 

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LEARN ABOUT DEBIAN

ctl_cyrusdb

CTL_CYRUSDB(8)						      System Manager's Manual						    CTL_CYRUSDB(8)

 *

NAME

       ctl_cyrusdb - perform operations common to all Cyrus databases

SYNOPSIS

       ctl_cyrusdb [ -C config-file ] -r [ -x ]
       ctl_cyrusdb [ -C config-file ] -c

DESCRIPTION

       Ctl_cyrusdb is used to perform various administrative operations on the Cyrus databases.

       Ctl_cyrusdb  reads its configuration options out of the imapd.conf(5) file unless specified otherwise by -C.  The configdirectory option is
       used to determine the default location of the Cyrus databases.

OPTIONS

       -C config-file
	      Read configuration options from config-file.

       -r     Recover the databases after an application or system failure.  Also performs database cleanup  like  removing  mailbox  reservations
	      (and any associated mailbox files).

	      All  mailbox  files  are	also checked to make sure the file format matches the configured database type in imapd.conf.  If not, the
	      file is automatically converted using the same logic as cvt_cyrusdb.

       -x     Used with -r to recover the database only.  (Prevents database cleanup).

       -c     Checkpoint and archive the databases.  Changes to the database which are part of committed transactions are written to disk.   Also,
	      a hot backup of the databases is made and inactive log files are removed.

FILES

       /etc/imapd.conf

SEE ALSO

       imapd.conf(5), cyrmaster(8)

CMU
								   Project Cyrus						    CTL_CYRUSDB(8)
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