Differences

This shows you the differences between two versions of the page.

--- reference:ifnull [2015/07/20 13:53] – [Usage] mnewnham
+++ reference:ifnull [2015/11/24 16:00] – [Description] mnewnham
@@ Line 8: / Line 8: @@
 </WRAP>
 ===== Description ====
-The function ''ifNull()'' returns a database-specific string providing the means to replace a null value with a specified replacement. The two parameters are:
+The function ''ifNull()'' returns a database-specific string providing the means to replace a null value with a specified replacement. If the value in the database is not null, the value is not updated. The two parameters are:
   - The field in the table to check.
@@ Line 21: / Line 21: @@
 /*
- * ifnullString returns 'CASE WHEN pants_field is null THEN 'chinos' ELSE pants_field END ";
+ * ifnullString returns 'CASE WHEN pants_field is null
+                              THEN 'chinos'
+                              ELSE pants_field
+                              END ";
 */
-$SQL = "UPDATE attire SET pants_field = $ifNullString";
+$SQL = "UPDATE attire
+           SET pants_field = $ifNullString";
 $db->Execute($SQL);
 </code>