Related Documentation Download this Manual
PDF (US Ltr) - 31.4Mb
PDF (A4) - 31.5Mb
PDF (RPM) - 30.0Mb
EPUB - 7.7Mb
HTML Download (TGZ) - 7.5Mb
HTML Download (Zip) - 7.5Mb
HTML Download (RPM) - 6.5Mb
Eclipse Doc Plugin (TGZ) - 8.2Mb
Eclipse Doc Plugin (Zip) - 10.1Mb
Man Pages (TGZ) - 181.3Kb
Man Pages (Zip) - 292.4Kb
Info (Gzip) - 2.8Mb
Info (Zip) - 2.8Mb
Excerpts from this Manual

MySQL 5.6 Reference Manual  /  ...  /  NULL Values

9.1.7 NULL Values

The NULL value means no data. NULL can be written in any lettercase. A synonym is \N (case sensitive).

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 13.2.6, “LOAD DATA INFILE Syntax”.

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”.


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