MySQL: How to check if Field is NULL or EMPTY - AskingBox
Jun 10, 2015 · Does someone know any way in MySQL to check whether an arbitrary field of a table is either containing an empty value (empty string) or it is NULL? I have tried some things …
MySQL: How to use IFNULL - Incorrect Parameter Count Error …
Jul 7, 2015 · I would like to use the function IFNULL in MySQL in order to check whether a field in my table is NULL. Up to now, I have tried the following query:
MySQL: Check for NULL
Jul 8, 2015 · The second example shows how to use IFNULL correctly. IFNULL expects two parameters: First the value to be checked (in your case the content of "col") and as a second …
MySQL: Select sum or 0 if no records found - AskingBox
SELECT IFNULL (SUM (col), 0) FROM tab WHERE ... COALESCE is returning the first passed parameter that is not NULL. That means: If SUM (col) is NULL, 0 as the second parameter will …
SQLite: Read out 0 if field is NULL - AskingBox
Sep 19, 2016 · The first argument of IFNULL () is the value coming from the column "points". If this value is not NULL, the value will be returned. However, if this values is NULL, the second …
MySQL: SELECT 0 instead of NULL - askingbox.com
Mar 31, 2014 · In one of my MySQL queries, it can happen from time to time that in the results there is the one or the other NULL value, because the corresponding cell has not yet been …
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Category MySQL: How to check if Field is NULL or EMPTY Question | 4 Answers | in Databases
MySQL: Line Breaks in MySQL - AskingBox
Jul 22, 2012 · MySQL only converts \r\n into a line break after receiving the query and writes this into the database. For security reasons and to avoid interference with some characters like …
MySQL: Write current Date or Time into Column - AskingBox
Dec 4, 2011 · We show you some useful features of MySQL to write the current date or the current time into a field.
MySQL: Combine full text search with LIKE search for words
Nov 12, 2011 · The full text search for MySQL is normally limited to a word length of at least 4 letters. In this tip, I have described, how to change the settings of MySQL to be able to also …