Migrating a PostgreSQL Database to SQL Anywhere 12 - Sybase
Migrating a PostgreSQL Database to SQL Anywhere 12 - Sybase
Migrating a PostgreSQL Database to SQL Anywhere 12 - Sybase
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!= <br />
opera<strong>to</strong>r<br />
(expr1 = expr2 OR ((expr1<br />
IS NULL) AND (expr2 IS<br />
NULL)))<br />
The opera<strong>to</strong>r represents equality<br />
including NULL values (NULL=NULL<br />
is true).<br />
ISNULL(expr)<br />
IS NULL expr<br />
INTERVAL(N, N1, N2,…) None built in A user defined function could easily<br />
be used <strong>to</strong> achieve the same<br />
functionality. For example: if (N <<br />
N1) then 0 elseif (N < N2) then 1<br />
elseif…<br />
! NOT<br />
&&<br />
AND<br />
|| OR<br />
A XOR B<br />
((a AND (NOT b)) OR ((NOT<br />
a) AND b))<br />
The <strong>SQL</strong> <strong>Anywhere</strong> expression is<br />
complex for large numbers of XOR<br />
arguments, so an alternative<br />
migration technique is<br />
recommended dependent on the<br />
application scenario.<br />
Data Manipulation Language<br />
<strong>Postgre<strong>SQL</strong></strong> statement<br />
INSERT …<br />
Equivalent <strong>SQL</strong> <strong>Anywhere</strong><br />
statement<br />
INSERT …<br />
Notes<br />
ON DUPLICATE KEY UPDATE ON EXISTING UPDATE <strong>SQL</strong> <strong>Anywhere</strong> also offers the options<br />
ERROR and SKIP for existing rows.<br />
SELECT …. INTO OUTFILE<br />
SELECT/UPDATE/DELETE …<br />
LIMIT<br />
DEFAULT ‘0’ NOT NULL<br />
au<strong>to</strong>_increment<br />
LIMIT offset, numRows<br />
UNLOAD SELECT<br />
DBI<strong>SQL</strong> OUTPUT TO<br />
FIRST or TOP n<br />
NOT NULL DEFAULT<br />
AUTOINCREMENT<br />
TOP numRows START AT<br />
offset<br />
2 <strong>Migrating</strong> a <strong>Postgre<strong>SQL</strong></strong> <strong>Database</strong> <strong>to</strong> <strong>SQL</strong> <strong>Anywhere</strong> <strong>12</strong><br />
December 2011
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