Related Documentation Download this Manual
PDF (US Ltr) - 37.4Mb
PDF (A4) - 37.5Mb
PDF (RPM) - 33.2Mb
HTML Download (TGZ) - 8.3Mb
HTML Download (Zip) - 8.4Mb
HTML Download (RPM) - 7.3Mb
Man Pages (TGZ) - 130.1Kb
Man Pages (Zip) - 185.6Kb
Info (Gzip) - 3.3Mb
Info (Zip) - 3.3Mb


MySQL 8.0 Reference Manual  /  ...  /  NULL Values

Pre-General Availability Draft: 2018-02-24

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
Sign Up Login You must be logged in to post a comment.