Difference between revisions of "LIKE()"
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==Description== | ==Description== | ||
| − | The LIKE() function is used to compare two character strings for matching qualities. The <expC1> specifies the matching pattern to look for. The <expC2> specifies the string in which to look. The <expC1> accepts "wildcard" characters with which to construct the pattern. Wildcard characters may represent upper case or lower case characters, but specific characters are case sensitive. The | + | The LIKE() function is used to compare two character strings for matching qualities. The <expC1> specifies the matching pattern to look for. The <expC2> specifies the string in which to look. The <expC1> accepts "wildcard" characters with which to construct the pattern. Wildcard characters may represent upper case or lower case characters, but specific characters are case sensitive. The Lianja/4GL supports the following wildcard characters: |
{| class="wikitable" | {| class="wikitable" | ||
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==Example== | ==Example== | ||
<code lang="recital"> | <code lang="recital"> | ||
| − | ?like("* | + | ?like("*Lianja*", "This is Lianja") |
.T. | .T. | ||
</code> | </code> | ||
Revision as of 14:02, 7 December 2012
Contents
Purpose
Function to compare two strings for similarities
Syntax
LIKE(<expC1>, <expC2>)
See Also
Description
The LIKE() function is used to compare two character strings for matching qualities. The <expC1> specifies the matching pattern to look for. The <expC2> specifies the string in which to look. The <expC1> accepts "wildcard" characters with which to construct the pattern. Wildcard characters may represent upper case or lower case characters, but specific characters are case sensitive. The Lianja/4GL supports the following wildcard characters:
| Characters | Description |
|---|---|
| ? | Matches any one character |
| % | Synonymous with ? |
| * | Matches zero or more characters |
If the LIKE() function is used in SQL statements, the following wildcard characters are available:
| Characters | Description |
|---|---|
| _ | Matches any one character |
| % | Matches zero or more characters |
The LIKE() function returns .T. if a matching pattern is found, or .F. otherwise.
Example
?like("*Lianja*", "This is Lianja") .T.
