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Locate sql command to search for the presence of a string in a field

Character sets include ignorable characters, which are characters that are not considered when performing a linguistic or culture-sensitive comparison. In a culture-sensitive search, if value contains an ignorable character, the result is equivalent to searching with that character removed.

If value consists only of one or more ignorable characters, the IndexOf String, Int32, Int32 method always returns startIndex , which is the character position at which the search begins. Only one of the strings contains the required substring. If the example is run on the. NET Framework 4 or later, in both cases, because the soft hyphen is an ignorable character, the method returns the index of "m" in the string when it performs a culture-sensitive comparison.


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Note that in the case of the first string, which includes the soft hyphen followed by an "m", the method fails to return the index of the soft hyphen but instead returns the index of the "m". As explained in Best Practices for Using Strings , we recommend that you avoid calling string comparison methods that substitute default values and instead call methods that require parameters to be explicitly specified.

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To use the comparison rules of the current culture to perform this operation, call the IndexOf String, Int32, Int32, StringComparison method overload with a value of CurrentCulture for its comparisonType parameter. The zero-based index position of the value parameter from the start of the current instance if that string is found, or -1 if it is not. The following example demonstrates three overloads of the IndexOf method that find the first occurrence of a string within another string using different values of the StringComparison enumeration.

The comparisonType parameter specifies to search for the value parameter using the current or invariant culture, using a case-sensitive or case-insensitive search, and using word or ordinal comparison rules. In a culture-sensitive search that is, if comparisonType is not Ordinal or OrdinalIgnoreCase , if value contains an ignorable character, the result is equivalent to searching with that character removed.

If value consists only of one or more ignorable characters, the IndexOf String, Int32, Int32, StringComparison method always returns startIndex , which is the character position at which the search begins. When it performs an ordinal comparison, however, it finds the substring only in the first string. Note that in the case of the first string, which includes the soft hyphen followed by an "m", the method fails to return the index of the soft hyphen but instead returns the index of the "m" when it performs a culture-sensitive comparison.

The method returns the index of the soft hyphen in the first string only when it performs an ordinal comparison. Index numbering starts from 0. If startIndex equals the length of the string instance, the method returns If value consists only of one or more ignorable characters, the IndexOf String, Int32, StringComparison method always returns startIndex , which is the character position at which the search begins.

The zero-based index position of value from the start of the string if that character is found, or -1 if it is not. The following example demonstrates the IndexOf method. This method performs an ordinal culture-insensitive search, where a character is considered equivalent to another character only if their Unicode scalar values are the same.

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To perform a culture-sensitive search, use the CompareInfo. The index position of the value parameter if that string is found, or -1 if it is not. If value is Empty , the return value is 0. If value consists only of one or more ignorable characters, the IndexOf String, StringComparison method always returns 0 zero to indicate that the match is found at the beginning of the current instance.

Only one of the strings contains a soft hyphen. Search MathWorks.

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Trial software. You are now following this question You will see updates in your activity feed. You may receive emails, depending on your notification preferences. Vote 0. How to locate the first negative number? Accepted Answer by Guillaume Guillaume view profile. Where is the error? Tags first negative number. See Also. Guillaume view profile. The screen below shows the result:. Note: you could use Data Validation to create simple dropdown menus for both salesperson and month.

It's simply a more flexible way to look things up. It's an excellent function with it's own benefits:. Skip to main content. Excel formula video training - quick, clean, and to the point. Related courses. Core Formula. You must have JavaScript enabled to use this form.


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