Difference between revisions of "MAX"
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(Created page with "<h3>MAX</h3> <table align='right' border='1'> <caption>Compatibility</caption> <caption>ABS(f)</caption> <tr><th>Engine</th><th>OK</th><th>Alternative</th></tr> <tr><td align=...") |
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<table align='right' border='1'> | <table align='right' border='1'> | ||
<caption>Compatibility</caption> | <caption>Compatibility</caption> | ||
| − | < | + | <tr><th colspan='3'>MAX(f)</th></tr> |
| − | <tr>< | + | <tr><td align='center'>'''Engine'''</td><td align='center'>'''OK'''</td><td align='center'>'''Alternative'''</td></tr> |
| − | <tr><td align='left'>mysql</td><td>Yes</td><td> | + | <tr><td align='left'>ingres</td><td>Yes</td><td></td></tr> |
| − | <tr><td align='left'>oracle</td><td> | + | <tr><td align='left'>mysql</td><td>Yes</td><td></td></tr> |
| − | <tr><td align='left'>postgres</td><td> | + | <tr><td align='left'>oracle</td><td>Yes</td><td></td></tr> |
| − | <tr><td align='left'>sqlserver</td><td> | + | <tr><td align='left'>postgres</td><td>Yes</td><td></td></tr> |
| + | <tr><td align='left'>sqlserver</td><td>Yes</td><td></td></tr> | ||
</table> | </table> | ||
<p>MAX finds the highest values in a column or part of a column</p> | <p>MAX finds the highest values in a column or part of a column</p> | ||
Revision as of 09:41, 13 July 2012
MAX
| MAX(f) | ||
|---|---|---|
| Engine | OK | Alternative |
| ingres | Yes | |
| mysql | Yes | |
| oracle | Yes | |
| postgres | Yes | |
| sqlserver | Yes | |
MAX finds the highest values in a column or part of a column
MAX is an aggregate function it is normally used with GROUP BY.
SELECT region, MAX(name)
FROM bbc
GROUP BY region
With a GROUP BY region statement each region shows up just once.
The MAX column gives the "largest" name in the region in the context of strings this is the last name alphabetically.
SELECT region, MAX(name) FROM bbc GROUP BY region
SELECT region, MAX(name) FROM bbc GROUP BY region
See also
