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Info Node: (mysql.info)NULL values

(mysql.info)NULL values


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`NULL' Values
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The `NULL' value means "no data" and is different from values such as
`0' for numeric types or the empty string for string types.  Note:
Problems with `NULL'.

`NULL' may be represented by `\N' when using the text file import or
export formats (`LOAD DATA INFILE', `SELECT ... INTO OUTFILE').  Note:
`LOAD DATA'.


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