Examples of using Null values in English and their translations into Vietnamese
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Colloquial
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Ecclesiastic
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Computer
Null values are not allowed.
It does not allow any null values.
Null values as the word"Undefined.".
Does not include any null values.
COUNT(*) also counts the null values.
A primary key cannot allow Null values and must always have a unique index.
Why primary key doesn't accepts null values?
How to replace null values based on other column match in the same table.
The e-mail address field that you selected contains null values.
The DMin and DMax functions ignore Null values in the field referenced by expr.
It may have one null key and multiple null values.
However, Null values are not evaluated in any SQL aggregate function.
The Nz functionis useful for expressions that may include Null values.
When turned off, the field will accept null values, meaning the field can remain blank.
Some fields, such as those defined as containing the primary key,can't contain Null values.
(HashMap allows null values as key and value whereas Hashtable doesn't allow nulls).
Do the following to minimize or eliminate any instances of null values in the table.
Some languages treat null values in a special way or allow you to work safely with values that might be null. .
Do the following to minimize or eliminate any instances of null values in the source file.
You frequently encounter null values, such as an unknown price for a new product or a value that a coworker forgot to add to an order.
If you want to collect data for every record,exit the wizard and replace the null values with e-mail addresses.
The ability to find and process null values can be a critical part of database operations, and the expressions in the following table demonstrate some common ways to deal with null values.
When serializing Perl data structures to JSONvalues undef will be converted to null values in JSON.
Finally, if you don't use separate tables for separate subjects,you will introduce null values(the absence of data) and redundancy into your tables, both of which can waste space and impede performance.
If you are planning to append the records to an existing table,make sure the corresponding field in the table accepts null values.
Note: If a text field contains null and zero-length strings, when sorted in ascending order,the records with null values are listed first, then the records with zero-length strings, and then the records with nonblank values. .
C provides a special data types, the nullable types, to which you can assignnormal range of values as well as null values.
By default, data that is hidden in rows and columns in the worksheet is not displayed in a chart,and empty cells or null values are displayed as gaps.
However, if the table contains fields that don't exist in the source,you do not need to delete those fields from the table if they accept null values.