ALTER TABLE ... ADD constraint - Revision history

Marek at 09:42, 18 July 2012

2012-07-18T09:42:25Z

2012-07-18T09:19:55Z

2012-07-12T15:52:06Z

@@ Line 18: / Line 18: @@
 <div class="ecomm e-access" style="display: none">The check is not supported.</div>
 <div class="ecomm e-oracle" style="display: none">
-<a href="http://sqlzoo.napier.ac.uk/big/B/s/a/statements_32a.htm#2103928">ALTER TABLE t DROP COLUMN c</a>
+[http://sqlzoo.napier.ac.uk/big/B/s/a/statements_32a.htm#2103928 ALTER TABLE t DROP COLUMN c]
 </div>
 <div class="ecomm e-db2" style="display: none">
-<a href="https://aurora.vcu.edu/db2help/db2s0/frame3.htm#sqls0604">
+[https://aurora.vcu.edu/db2help/db2s0/frame3.htm#sqls0604 ALTER TABLE documentation.]<br/>
-ALTER TABLE documentation.</a><br/>
 DB2 seemingly does not permit this operation - any help would be appreciated.
 </div>
-<div class="ecomm e-postgres" style="display: none"><a href="http://www.ca.postgresql.org/users-lounge/docs/7.0/user/sql-altertable.htm">ALTER TABLE</a></div>
+<div class="ecomm e-postgres" style="display: none">[http://www.ca.postgresql.org/users-lounge/docs/7.0/user/sql-altertable.htm ALTER TABLE]</div>
 </div>
 {{CREATE and DROP ref}}

@@ Line 5: / Line 5: @@
 We can add a constraint
 <ul><li>a foreign key reference</li><li>a UNIQUE requirement</li><li>a CHECK constraint</li></ul>
-This is in the SQL standard ALTER TABLE: http://sqlzoo.net/sql92.html#alter_table_statement
+This is in the SQL standard [http://sqlzoo.net/sql92.html#alter_table_statement ALTER TABLE]
 </div>
 <source lang=sql class='tidy'>DROP TABLE a</source>