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Data cleaning: Difference between revisions
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→Numeric only
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* find '''NOT''' numeric values {{code | code = SELECT * FROM `my_table` WHERE `my_column` NOT REGEXP '^[0-9]+$'}} | * find '''NOT''' numeric values {{code | code = SELECT * FROM `my_table` WHERE `my_column` NOT REGEXP '^[0-9]+$'}} | ||
Excel: | Excel & [https://www.google.com/sheets/about/ Google Sheets]: | ||
* [http://www.techonthenet.com/excel/formulas/isnumber.php ISNUMBER Function] | * [http://www.techonthenet.com/excel/formulas/isnumber.php ISNUMBER Function] | ||
** Return 1 if the cell value is (1) Numbers (2) Numbers in [https://en.wikipedia.org/wiki/Scientific_notation scientific (exponential) notation] e.g. {{code | code = <nowiki>1.23E+16</nowiki>}} | |||
** Return 0 if the cell value is (1) Text (2) Numbers that are stored as text e.g. {{code | code = <nowiki>="5"</nowiki>}} | |||
* Google Sheets only: Using [https://support.google.com/docs/answer/3098292?hl=zh-Hant REGEXMATCH], [https://support.google.com/docs/answer/3094140?hl=zh-Hant TRIM] & [https://support.google.com/docs/answer/3093592?hl=zh-Hant CONCAT]<ref>[https://errerrors.blogspot.tw/2015/08/google.html GOOGLE 試算表: 數字轉成文字]</ref> functions: {{code | code = <nowiki>=IF(REGEXMATCH(CONCAT("", TRIM(A1)), "^\d+$"), 1, 0)</nowiki>}} | |||
** Return 1 if the cell value is (1) Numbers (2) Numbers that are stored as text e.g. {{code | code = <nowiki>="5"</nowiki>}} | |||
** Return 0 if the cell value is (1) Text (2) Numbers in scientific (exponential) notation e.g. {{code | code = <nowiki>1.23E+16</nowiki>}} | |||
<pre> | <pre> | ||
test data: | test data: | ||