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What is the difference between position() and strpos() in PostgreSQL?
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-------------------------------PostgreSQL----------------------------------------- | |
select | |
tags, | |
position('technology' in tags) as position_tech, | |
strpos(tags, 'technology') as strpos_tech | |
position('Technology' in tags) as position_Tech, | |
strpos(tags, 'Technology') as strpos_Tech, | |
position('TED%' in tags) as position_TED_wild, | |
strpos(tags, 'TED%') as strpos_TED_wild | |
from public.ted_talks | |
/* tags |position_tech |strpos_tech | |
------------------------------------------------------------------------------------------------------------------------------|--------------|---- | |
['computers'; 'entertainment'; 'interface design'; 'media'; 'music'; 'performance'; implicity'; oftware'; 'technology'] |108 |108 | |
['MacArthur grant'; 'activism'; 'business'; 'cities'; 'environment'; 'green'; 'inequality'; 'politics'; 'pollution'] |0 |0 | |
['Africa'; 'Asia'; 'Google'; 'demo'; 'economics'; 'global development'; 'global issues'; 'health'; 'math'; tatistics'] |0 |0 | |
['activism'; 'architecture'; 'collaboration'; 'culture'; 'design'; 'disaster relief'; 'global issues'; 'invention'] |0 |0 | |
['TED Prize'; 'art'; 'culture'; 'entertainment'; 'film'; 'global issues'; 'movies'; 'peace'; ocial change'] |0 |0 | |
['TED Prize'; 'collaboration'; 'disease'; 'ebola'; 'global issues'; 'health'; cience'; 'technology'] |89 |89 | |
['demo'; 'design'; 'interface design'; 'technology'] |41 |41 | |
['children'; 'design'; 'education'; 'entrepreneur'; 'global issues'; 'philanthropy'; ocial change'; 'technology'] |102 |102 | |
['entertainment'; 'music'; 'performance'; 'violin'; 'wunderkind'; 'youth'] |0 |0 | |
['creativity'; 'entertainment'; 'music'; 'performance'; 'piano'; 'wunderkind'] |0 |0 | |
['business'; 'collaboration'; 'culture'; 'invention'; 'media'; 'open-source'; 'technology'; 'wikipedia'] |80 |80 | |
['TED Fellows'; 'disease'; 'health care'; 'innovation'; 'invention'; 'medicine'; 'product design'] |0 |0 | |
['business'; 'collaboration'; 'culture'; 'global issues'; 'library'; 'open-source'; 'technology'] |86 |86 | |
['collaboration'; 'comedy'; 'community'; 'culture'; 'dance'; 'demo'; 'entertainment'; 'humor'; 'performance'] |0 |0 | |
tags |position_Tech |strpos_Tech | |
------------------------------------------------------------------------------------------------------------------------------|--------------|---- | |
['computers'; 'entertainment'; 'interface design'; 'media'; 'music'; 'performance'; implicity'; oftware'; 'technology'] |0 |0 | |
['MacArthur grant'; 'activism'; 'business'; 'cities'; 'environment'; 'green'; 'inequality'; 'politics'; 'pollution'] |0 |0 | |
['Africa'; 'Asia'; 'Google'; 'demo'; 'economics'; 'global development'; 'global issues'; 'health'; 'math'; tatistics'] |0 |0 | |
['activism'; 'architecture'; 'collaboration'; 'culture'; 'design'; 'disaster relief'; 'global issues'; 'invention'] |0 |0 | |
['TED Prize'; 'art'; 'culture'; 'entertainment'; 'film'; 'global issues'; 'movies'; 'peace'; ocial change'] |0 |0 | |
['TED Prize'; 'collaboration'; 'disease'; 'ebola'; 'global issues'; 'health'; cience'; 'technology'] |0 |0 | |
['demo'; 'design'; 'interface design'; 'technology'] |0 |0 | |
['children'; 'design'; 'education'; 'entrepreneur'; 'global issues'; 'philanthropy'; ocial change'; 'technology'] |0 |0 | |
['entertainment'; 'music'; 'performance'; 'violin'; 'wunderkind'; 'youth'] |0 |0 | |
['creativity'; 'entertainment'; 'music'; 'performance'; 'piano'; 'wunderkind'] |0 |0 | |
['business'; 'collaboration'; 'culture'; 'invention'; 'media'; 'open-source'; 'technology'; 'wikipedia'] |0 |0 | |
['TED Fellows'; 'disease'; 'health care'; 'innovation'; 'invention'; 'medicine'; 'product design'] |0 |0 | |
['business'; 'collaboration'; 'culture'; 'global issues'; 'library'; 'open-source'; 'technology'] |0 |0 | |
['collaboration'; 'comedy'; 'community'; 'culture'; 'dance'; 'demo'; 'entertainment'; 'humor'; 'performance'] |0 |0 | |
tags |position_TED_wild |strpos_TED_wild | |
------------------------------------------------------------------------------------------------------------------------------|------------------|---- | |
['computers'; 'entertainment'; 'interface design'; 'media'; 'music'; 'performance'; implicity'; oftware'; 'technology'] |0 |0 | |
['MacArthur grant'; 'activism'; 'business'; 'cities'; 'environment'; 'green'; 'inequality'; 'politics'; 'pollution'] |0 |0 | |
['Africa'; 'Asia'; 'Google'; 'demo'; 'economics'; 'global development'; 'global issues'; 'health'; 'math'; tatistics'] |0 |0 | |
['activism'; 'architecture'; 'collaboration'; 'culture'; 'design'; 'disaster relief'; 'global issues'; 'invention'] |0 |0 | |
['TED Prize'; 'art'; 'culture'; 'entertainment'; 'film'; 'global issues'; 'movies'; 'peace'; ocial change'] |0 |0 | |
['TED Prize'; 'collaboration'; 'disease'; 'ebola'; 'global issues'; 'health'; cience'; 'technology'] |0 |0 | |
['demo'; 'design'; 'interface design'; 'technology'] |0 |0 | |
['children'; 'design'; 'education'; 'entrepreneur'; 'global issues'; 'philanthropy'; ocial change'; 'technology'] |0 |0 | |
['entertainment'; 'music'; 'performance'; 'violin'; 'wunderkind'; 'youth'] |0 |0 | |
['creativity'; 'entertainment'; 'music'; 'performance'; 'piano'; 'wunderkind'] |0 |0 | |
['business'; 'collaboration'; 'culture'; 'invention'; 'media'; 'open-source'; 'technology'; 'wikipedia'] |0 |0 | |
['TED Fellows'; 'disease'; 'health care'; 'innovation'; 'invention'; 'medicine'; 'product design'] |0 |0 | |
['business'; 'collaboration'; 'culture'; 'global issues'; 'library'; 'open-source'; 'technology'] |0 |0 | |
['collaboration'; 'comedy'; 'community'; 'culture'; 'dance'; 'demo'; 'entertainment'; 'humor'; 'performance'] |0 |0 | |
* | |
***/ |
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