Difference between revisions of "PREPARE"

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=PREPARE=
 
 
 
==Class==
 
SQL Applications
 
 
 
 
==Purpose==
 
==Purpose==
 
Set up an SQL statement for subsequent execution
 
Set up an SQL statement for subsequent execution
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<code lang="recital">
 
<code lang="recital">
 
stmtbuf = 'SELECT * FROM customers WHERE contactnam = ?'
 
stmtbuf = 'SELECT * FROM customers WHERE contactnam = ?'
exec sql
+
prepare mystmt from :stmtbuf
prepare mystmt from :stmtbuf;
+
  
 
gcAuthor = 'Ann Devon'
 
gcAuthor = 'Ann Devon'
exec sql
+
execute mystmt using :gcAuthor
execute mystmt using :gcAuthor;
+
  
 
gcAuthor = 'Yang Wang'
 
gcAuthor = 'Yang Wang'
exec sql
+
execute mystmt using :gcAuthor
execute mystmt using :gcAuthor;
+
  
 
stmtbuf = 'INSERT INTO customers (customerid, companynam, contactnam) VALUES (?,?,?)'
 
stmtbuf = 'INSERT INTO customers (customerid, companynam, contactnam) VALUES (?,?,?)'
exec sql
+
prepare mystmt from :stmtbuf
prepare mystmt from :stmtbuf;
+
  
 
buf1 = '00101'
 
buf1 = '00101'
 
buf2 = 'Recital'
 
buf2 = 'Recital'
 
buf3 = 'US'
 
buf3 = 'US'
exec sql
+
execute mystmt using :buf1, :buf2, :buf3
execute mystmt using :buf1, :buf2, :buf3;
+
 
</code>
 
</code>
  
  
 
==Products==
 
==Products==
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
+
Recital Server, Recital  
 
[[Category:Documentation]]
 
[[Category:Documentation]]
 
[[Category:SQL]]
 
[[Category:SQL]]
 
[[Category:Commands]]
 
[[Category:Commands]]

Latest revision as of 15:56, 22 December 2009

Purpose

Set up an SQL statement for subsequent execution


Syntax

PREPARE <statement> FROM :<variable>


See Also

EXECUTE, EXECUTE IMMEDIATE


Description

The PREPARE command is used to set up an SQL statement for subsequent execution. The EXECUTE command is used to execute the statement. Variables used as parameters in the SQL statement must be declared before execution.


Keywords Description
statement An identifier for the SQL statement.
variable The name of a variable containing the SQL statement as a string


Example

stmtbuf = 'SELECT * FROM customers WHERE contactnam = ?'
prepare mystmt from :stmtbuf
 
gcAuthor = 'Ann Devon'
execute mystmt using :gcAuthor
 
gcAuthor = 'Yang Wang'
execute mystmt using :gcAuthor
 
stmtbuf = 'INSERT INTO customers (customerid, companynam, contactnam) VALUES (?,?,?)'
prepare mystmt from :stmtbuf
 
buf1 = '00101'
buf2 = 'Recital'
buf3 = 'US'
execute mystmt using :buf1, :buf2, :buf3


Products

Recital Server, Recital