Difference between revisions of "PREPARE"
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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. | 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. | ||
| − | {| class="wikitable" | + | {| class="wikitable" width="100%" |
!Keywords||Description | !Keywords||Description | ||
|- | |- | ||
|statement||An identifier for the SQL statement. | |statement||An identifier for the SQL statement. | ||
|- | |- | ||
| − | |variable||The name of a variable containing the SQL statement as a string | + | |valign="top"|variable||The name of a variable containing the SQL statement as a string |
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buf1 = '00101' | buf1 = '00101' | ||
| − | buf2 = ' | + | buf2 = 'Lianja' |
buf3 = 'US' | buf3 = 'US' | ||
execute mystmt using :buf1, :buf2, :buf3 | execute mystmt using :buf1, :buf2, :buf3 | ||
Latest revision as of 11:38, 30 January 2013
Contents
Purpose
Set up an SQL statement for subsequent execution
Syntax
PREPARE <statement> FROM :<variable>
See Also
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 = 'Lianja' buf3 = 'US' execute mystmt using :buf1, :buf2, :buf3
