kurs:case
Differences
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| Last revision Both sides next revision | |||
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kurs:case [2014/09/10 21:22] 127.0.0.1 external edit |
kurs:case [2015/10/19 10:58] mh |
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| Line 7: | Line 7: | ||
| from employees order by hire_date desc; | from employees order by hire_date desc; | ||
| </code> | </code> | ||
| + | |||
| + | <code> | ||
| + | select first_name, | ||
| + | last_name, | ||
| + | hire_date, | ||
| + | age_class from | ||
| + | (select first_name, | ||
| + | last_name, | ||
| + | hire_date, | ||
| + | case when hd < 2003 then 'old' | ||
| + | when hd < 2005 then 'average' | ||
| + | when hd < 2007 then 'young' | ||
| + | else 'even younger' end age_class | ||
| + | from | ||
| + | (select first_name, | ||
| + | last_name, | ||
| + | hire_date, | ||
| + | extract(year from hire_date) hd from employees)) | ||
| + | order by decode(age_class, | ||
| + | 'old', 0, | ||
| + | 'average', 1, | ||
| + | 'young', 2, | ||
| + | 'even younger', 3, | ||
| + | 'error') | ||
| + | </code> | ||
| decode | decode | ||
kurs/case.txt ยท Last modified: 2020/05/11 09:26 by admin
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