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 ...
The SQL DEFAULT constraint is a constraint that can be added to tables to specify a default value for a column. The default value is used for the column’s value when one is not specified (for example, when you insert a row into the table without specifying a value for the column). T...
In SQL Server, you can use the CONCAT() function to concatenate string values from expressions or columns containing a NULL. This function takes a list of strings and displays all these values in one string. The function ignores NULL, they are treated as if they were an empty string. Solut...
Add Time in SQL HH:MM:SS to another HH:MM:SS Adding a column to a large (100 million rows) table with default constraint adding a extra column in a pivot table created uisng T-SQL Pivot Table query Adding a partition scheme to an existing table. Adding a Value to a 'date' C...
You need to use parameterized query and pass DBNull.Value as a parameter's value. In that case it will work fine. Here is sample how to use parameterized queries/stored procedures http://support.microsoft.com/kb/308049/en-us V Can use this if v r having Stored Procedure. but i m not...
You can use your union query, and you don't need the left joins to make a null result set. As mentioned, add another column to identify the queries in the results and then modify your code to check for the specific results. For example, since you mention needing them in a particular ...
NULL Values Are Unavoidable The column definition in theCREATE TABLE statementallows us to specify a column as NULL or NOT NULL. If we specify NULL in the column definition, then the column can have a value of NULL. When we insert a row, we are not required to specify a value for any...
” In SQL, avalue expression— also sometimes referred to as ascalar expression— is any expression that will return a single value. A value expression can be a literal value, like a string or numeric value, a mathematical expression, or a column name. Note that it’s almost always the ...
A NULL value can be used in various situations in SQL: When the data is unavailable or unknown at the time of data entry. When the data doesn't apply to the entity in question. For example, in a survey, a question asking participants to tick the box if they have kids might have som...
$arr[$i] = NULL; -- no quotes Then use mysql_real_escape_string because it recognizes NULL and 'does the right thing'.Navigate: Previous Message• Next Message Options: Reply• Quote Subject Written By Posted How to Insert NULL value into SQL - Here THE Solution One Ask ...