What is ISQL?

I read a little bit in internet but I'm not sure to understand what ISQL? Is it like an ODBC driver forLinux?
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SAM2009Asked:
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Pawan KumarConnect With a Mentor Database ExpertCommented:
Here are the details...

In database computing, various utilities for accessing SQL-based databases use variants of the isql moniker - often with an implication of running interactive SQL. They include:
isql, a Sybase client
isql, a unixODBC program
iSQL, an ALTIBASE HDB utility
iSQL*Plus, a web-based interface to Oracle's SQL*Plus
ISQL, Informix SQL - an Informix tool
ISQL, InterBase SQL command utility
ISQL, a command-line interface for Microsoft SQL Server


Enjoy !!
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Dave BaldwinConnect With a Mentor Fixer of ProblemsCommented:
ODBC for Linux is not just a single program or driver.  The asker in this question https://www.experts-exchange.com/questions/27424576/Looking-for-examples-on-connecting-to-MS-SQL-Server-with-freetds-in-C.html figured out how to make it work.  However, if you are not the programmer, it is unlikely that this will help you.  I don't know of any way for a 'user' to check the connection without some program being written for them.
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Dave BaldwinConnect With a Mentor Fixer of ProblemsCommented:
Supposedly, Microsoft is porting MS SQL Server to Linux.  If they do, there will probably be tools available then.  The 'gotcha' there is that Microsoft so far has only ported their SQL interfaces to RedHat Enterprise Linux.
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ZberteocConnect With a Mentor Commented:
Because the question is in MS SQL Server category I would assume you are talking about the ISQL utility that comes with the SQL server. Since the earliest versions SQL server had command line utilities in the form of compact executables that can be used from prompter window, batch files, etc, to connect to SQL server instances and execute queries. In time they simply evolved under different names:

ISQL, OSQL and now SQLCMD. I would say that the first two are obsolete so you should stick with the newest one, SQLCMD, which is used since SQL 2005.
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Pawan KumarDatabase ExpertCommented:
@Author - Do you need any more help on this ?
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SAM2009Author Commented:
Thanks
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