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Full Discussion: Decode the statement!!
Operating Systems Linux Decode the statement!! Post 302593499 by itkamaraj on Friday 27th of January 2012 05:09:17 AM
Old 01-27-2012
Read about

Code:
 
man test


Code:
 
[ -z "$VAR" ]
 check the $VAR is empty or not
    -z string  True if  the  length  of  string  string is zero.
 
 [ -x "/bin/setup" ] -- if it is empty, then check whether /bin/setup is having the execute permission for that user 
 If the user has execute permission, then execute the setup file with argument 1
 If the user didnt have the execute permission, then check whether we have a directory called /tmp [ -d "/tmp/" ] and if it is there, then set the VAR variable value as /tmp
 and export it

---------- Post updated at 03:39 PM ---------- Previous update was at 03:36 PM ----------

for && ||

example is

Code:
 
if [ condition ] then
echo "True"
else
echo "False"
fi

can be write like below
Code:
 
[ condition ] && echo "True" || echo "False"

 

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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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