Related Documentation Download this Manual
PDF (US Ltr) - 38.2Mb
PDF (A4) - 38.3Mb
PDF (RPM) - 33.1Mb
HTML Download (TGZ) - 8.1Mb
HTML Download (Zip) - 8.1Mb
HTML Download (RPM) - 7.0Mb
Man Pages (TGZ) - 133.2Kb
Man Pages (Zip) - 189.2Kb
Info (Gzip) - 3.4Mb
Info (Zip) - 3.4Mb
Excerpts from this Manual

MySQL 8.0 Reference Manual  /  ...  /  NULL Values

9.1.7 NULL Values

The NULL value means no data. NULL can be written in any lettercase.

Be aware that the NULL value is different from values such as 0 for numeric types or the empty string for string types. For more information, see Section B.5.4.3, “Problems with NULL Values”.

For text file import or export operations performed with LOAD DATA INFILE or SELECT ... INTO OUTFILE, NULL is represented by the \N sequence. See Section 13.2.7, “LOAD DATA INFILE Syntax”.

For sorting with ORDER BY, NULL values sort before other values for ascending sorts, after other values for descending sorts.


User Comments
User comments in this section are, as the name implies, provided by MySQL users. The MySQL documentation team is not responsible for, nor do they endorse, any of the information provided here.
Sign Up Login You must be logged in to post a comment.