[Mysql will know will be reading notes]
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2020-02-07 22:02:27
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Two brush "Mysql will know will be" record some knowledge easy to ignore the error-prone, suitable as a reference book.
Chapter V p31
- Default ascending, descending desc;
Chapter VI p38
- between ... and ... start and end values;
Chapter VII p42
- and greater than or priority;
Chapter VIII p48
- where pname like '%' can not match the values in row NULL as the product name;
Chapter IX p67
- Regular expressions also need to continue to strengthen learning! ! !
Chapter X p63
- concat () function: string concatenation;
- now () function: Get the current time;
- rtrim () function: to remove the right of the space;
- ltrim () function: to remove left blank;
- trim () function: removing the left and right spaces;
Chapter XI p69
Origin www.cnblogs.com/luruihua/p/12274686.html