Difference between revisions of "INSTR"
From SQLZOO
(Created page with "<table align='right' border='1'> <caption>Compatibility</caption> <tr><th colspan='3'>INSTR(s1, s2)</th></tr> <tr><td align='center'>'''Engine'''</td><td align='center'>'''OK'...") |
|||
| (2 intermediate revisions by 2 users not shown) | |||
| Line 3: | Line 3: | ||
<tr><th colspan='3'>INSTR(s1, s2)</th></tr> | <tr><th colspan='3'>INSTR(s1, s2)</th></tr> | ||
<tr><td align='center'>'''Engine'''</td><td align='center'>'''OK'''</td><td align='center'>'''Alternative'''</td></tr> | <tr><td align='center'>'''Engine'''</td><td align='center'>'''OK'''</td><td align='center'>'''Alternative'''</td></tr> | ||
| − | <tr><td align='left'>ingres</td><td>No</td><td>[[POSITION(s2 IN s1)]]</td></tr> | + | <tr><td align='left'>ingres</td><td>No</td><td>[[POSITION |POSITION(s2 IN s1)]]</td></tr> |
<tr><td align='left'>mysql</td><td>Yes</td><td></td></tr> | <tr><td align='left'>mysql</td><td>Yes</td><td></td></tr> | ||
<tr><td align='left'>oracle</td><td>Yes</td><td></td></tr> | <tr><td align='left'>oracle</td><td>Yes</td><td></td></tr> | ||
| − | <tr><td align='left'>postgres</td><td>No</td><td>[[POSITION(s2 IN s1)]]</td></tr> | + | <tr><td align='left'>postgres</td><td>No</td><td>[[POSITION |POSITION(s2 IN s1)]]</td></tr> |
| − | <tr><td align='left'>sqlserver</td><td>No</td><td>[[PATINDEX('%'+s2+'%',s1)]]</td></tr> | + | <tr><td align='left'>sqlserver</td><td>No</td><td>[[PATINDEX |PATINDEX('%'+s2+'%',s1)]]</td></tr> |
</table> | </table> | ||
| + | |||
<h1>INSTR</h1> | <h1>INSTR</h1> | ||
<p>INSTR(s1, s2) returns the character position of the substring s2 within the larger string s1. The first character is in position 1. If s2 does not occur in s1 it returns 0. </p> | <p>INSTR(s1, s2) returns the character position of the substring s2 within the larger string s1. The first character is in position 1. If s2 does not occur in s1 it returns 0. </p> | ||
| Line 17: | Line 18: | ||
<div class='ht'> | <div class='ht'> | ||
| − | In this example you get the | + | In this example you get the position of string 'an' within a country's name. |
<source lang='sql' class='def e-postgres e-ingres'> | <source lang='sql' class='def e-postgres e-ingres'> | ||
SELECT name, | SELECT name, | ||
| Line 38: | Line 39: | ||
<p>See also</p> | <p>See also</p> | ||
<ul> | <ul> | ||
| − | <li>[[SUBSTRING function]]</li> | + | <li>[[SUBSTRING |SUBSTRING function]]</li> |
| − | <li>[[LEFT function]]</li> | + | <li>[[LEFT |LEFT function]]</li> |
| − | <li>[[RIGHT function]]</li> | + | <li>[[RIGHT |RIGHT function]]</li> |
</ul> | </ul> | ||
| + | |||
| + | {{Languages}} | ||
Latest revision as of 20:36, 22 October 2012
| INSTR(s1, s2) | ||
|---|---|---|
| Engine | OK | Alternative |
| ingres | No | POSITION(s2 IN s1) |
| mysql | Yes | |
| oracle | Yes | |
| postgres | No | POSITION(s2 IN s1) |
| sqlserver | No | PATINDEX('%'+s2+'%',s1) |
INSTR
INSTR(s1, s2) returns the character position of the substring s2 within the larger string s1. The first character is in position 1. If s2 does not occur in s1 it returns 0.
INSTR('Hello world', 'll') -> 3
In this example you get the position of string 'an' within a country's name.
SELECT name, POSITION('an' IN name) FROM bbc
SELECT name, PATINDEX('%an%', name) FROM bbc ORDER BY name
SELECT name, INSTR(name, 'an') FROM bbc
See also
| Language: | English • Deutsch |
|---|
