These value then POST by the form and then captured by server script(in this case PHP). The problem is: ALL of this captured blank are actually treated as '' << blank string NOT the actual NULL. SO, if you tried to write these blank values into mySQL cell that was defined as INT ...
have some form of server-side or even client-side technology that can be used to filter out database query results which may contain NULL or empty values, using another language and that additional burden of executing code is typically more costly for the server and, in fact, largely ...
In MySQL NULL values are considered lower than any non-NULL value, therefore, NULL values appear first when the order is ASC (ascending), and ordered last when the order is DESC (descending). We'll be discussing the following two cases as sorting NULL values in either of the cases might...
Partitioning in MySQL does nothing to disallow NULL as the value of a partitioning expression, whether it is a column value or the value of a user-supplied expression. Even though it is permitted to use NULL as the value of an expression that must otherwise yield an integer, it is importan...
Efficiently uncover, resolve, and eliminate duplicate values in your SQL tables with our easy, step-by-step guide! Learn to clean your data efficiently.
Partitioning in MySQL does nothing to disallow NULL as the value of a partitioning expression, whether it is a column value or the value of a user-supplied expression. Even though it is permitted to use NULL as the value of an expression that must otherwise yield an integer, it is importan...
Array data type in SQL server Array's IN SQL SERVER? ASCII values for extended characters Assign empty string '' if datetime is null Assign EXEC output to Variable Assigning NULL value to column name using Case Statement of where is SQL SERVER 2008 atomic if not exists() and insert or upd...
In the case of fast batch insertion, the framework will not automatically assign a value to the ID field of the entity.At the same time, if the database is mysql , there are some special circumstances.First, the driver library must have MySqlConnector .This library can coexist with mysql....
Based on the expression return value, the “is null” function decides to return 1 or 0. How Does MySQL ISNULL Works? Now let us see the usage of the ISNULL () function in the SQL server. Code: select isnull ('Hello world! This is ISNULL function' ) AS "IS NULL"; ...
Re: How to control Unique key with null values 1647 ximo marco January 28, 2011 06:03AM Re: How to control Unique key with null values 1714 Peter Brawley January 28, 2011 09:52AM Sorry, you can't reply to this topic. It has been closed....