It is not the operator that is case sensitive, it is the column itself. When a SQL Server installation is performed a default collation is chosen to the instance. Unless explicitly mentioned otherwise (check the collate clause bellow) when a new database is created it inherits the collation from the instance and when a new … Read more
For SQL Server, from http://msdn.microsoft.com/en-us/library/ms179859.aspx : % Any string of zero or more characters. WHERE title LIKE ‘%computer%’ finds all book titles with the word ‘computer’ anywhere in the book title. _ Any single character. WHERE au_fname LIKE ‘_ean’ finds all four-letter first names that end with ean (Dean, Sean, and so on). [ ] … Read more
FTS does not support LIKE The previously accepted answer was incorrect. Full Text Search with its full text indexes is not for the LIKE operator at all, it has its own operators and doesn’t work for arbitrary strings. It operates on words based on dictionaries and stemming. It does support prefix matching for words, but … Read more
In general, there is a tradeoff between “precision” and “recall”. High precision means that fewer irrelevant results are presented (no false positives), while high recall means that fewer relevant results are missing (no false negatives). Using the LIKE operator gives you 100% precision with no concessions for recall. A full text search facility gives you … Read more
Use something like this – SELECT DISTINCT COL_NAME FROM myTable WHERE UPPER(COL_NAME) LIKE UPPER(‘%PriceOrder%’) or SELECT DISTINCT COL_NAME FROM myTable WHERE LOWER(COL_NAME) LIKE LOWER(‘%PriceOrder%’)
Faster way of doing this: WHERE interests LIKE ‘%sports%’ OR interests LIKE ‘%pub%’ is this: WHERE interests REGEXP ‘sports|pub’ Found this solution here: http://forums.mysql.com/read.php?10,392332,392950#msg-392950 More about REGEXP here: http://www.tutorialspoint.com/mysql/mysql-regexps.htm
There are 3 main ways to perform a case-insensitive search in Oracle without using full-text indexes. Ultimately what method you choose is dependent on your individual circumstances; the main thing to remember is that to improve performance you must index correctly for case-insensitive searching. 1. Case your column and your string identically. You can force … Read more
The second (assuming you means CONTAINS, and actually put it in a valid query) should be faster, because it can use some form of index (in this case, a full text index). Of course, this form of query is only available if the column is in a full text index. If it isn’t, then only … Read more
LIKE ‘WC[[]R]S123456’ or LIKE ‘WC\[R]S123456’ ESCAPE ‘\’ Should work.
Different Operators LIKE and = are different operators. Most answers here focus on the wildcard support, which is not the only difference between these operators! = is a comparison operator that operates on numbers and strings. When comparing strings, the comparison operator compares whole strings. LIKE is a string operator that compares character by character. … Read more