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Full Discussion: Read SQL statement in Script
Top Forums Shell Programming and Scripting Read SQL statement in Script Post 302527100 by freakygs on Thursday 2nd of June 2011 11:34:50 AM
Old 06-02-2011
Read SQL statement in Script

Hi Guys..

need some urgent help... I am stuck in something badly

I need to write a script which would read a sql statement (which might be a join/inner join/select/sub select etc. )

I need to read that sql statement ... and in the output I want all the table names and columns (doesn't matter if the columns are used in select or where or join) used in that script....


ex.

Code:
SQL:
select a.empno, b.deptname from emp a inner join dept b on a.deptno=b.deptno where a.salary in (select salary from sal where salary>1000)

(I know its a bad query, but just an example)
Please also remember that there can be several sub selects in a single select


Code:
Output:

TABLENAME 	COLUMNNAME
emp		empno
emp		deptno
emp		salary
dept		deptname
dept		deptno
sal		salary

Any help would be great.. Smilie
Thanks a lot...
 

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EXECUTE(7)							   SQL Commands 							EXECUTE(7)

NAME
EXECUTE - execute a prepared statement SYNOPSIS
EXECUTE name [ ( parameter [, ...] ) ] DESCRIPTION
EXECUTE is used to execute a previously prepared statement. Since prepared statements only exist for the duration of a session, the pre- pared statement must have been created by a PREPARE statement executed earlier in the current session. If the PREPARE statement that created the statement specified some parameters, a compatible set of parameters must be passed to the EXECUTE statement, or else an error is raised. Note that (unlike functions) prepared statements are not overloaded based on the type or number of their parameters; the name of a prepared statement must be unique within a database session. For more information on the creation and usage of prepared statements, see PREPARE [prepare(7)]. PARAMETERS
name The name of the prepared statement to execute. parameter The actual value of a parameter to the prepared statement. This must be an expression yielding a value that is compatible with the data type of this parameter, as was determined when the prepared statement was created. OUTPUTS
The command tag returned by EXECUTE is that of the prepared statement, and not EXECUTE. EXAMPLES
Examples are given in the Examples [prepare(7)] section of the PREPARE [prepare(7)] documentation. COMPATIBILITY
The SQL standard includes an EXECUTE statement, but it is only for use in embedded SQL. This version of the EXECUTE statement also uses a somewhat different syntax. SEE ALSO
DEALLOCATE [deallocate(7)], PREPARE [prepare(7)] SQL - Language Statements 2010-05-14 EXECUTE(7)
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