![]() ![]() Carlos Soublette #8-35Ĭarrera 52 con Ave. People use those things all over the place in their application and therefore it makes sense to approach the topic from a performance point of view. This is intended as a general, academic question, and so should not matter which DB, but it arose using SQL Server 2005. LIKE and ILIKE are two fundamental SQL features. In this case it would seem to me that 'like' would have an advantage, all other things being equal. ![]() I know for sure whether my string is in upper case or lower case, would LIKE be faster, or ILIKE, or both are about the same Comment As. ILIKE May1 September 2013 If I don't care about the cases, i.e. However, it uses a different method for comparision, and the 'LIKE' would be much slower. Your input is greatly appreciated Performance of LIKE vs. In that case, there is no difference that would come up in the results. Under certain conditions it can provide better query performance than LIKE. Please take this survey to help us learn more about how you use third party tools. LIKE is a standard SQL operator, where as ILIKE is only implemented in certain databases such as PostgreSQL and Snowflake. There are two main differences between the two: ILIKE is case-insensitive whereas LIKE is case-sensitive. Support for ILIKE was introduced in Zen v15 SP1. The ILIKE operator is very similar to the LIKE operator in that both are for pattern matching. Their syntax is identical, but LIKE is case-sensitive, while ILIKE is case-insensitive. String Functions: ASCII CHAR_LENGTH CHARACTER_LENGTH CONCAT CONCAT_WS FIELD FIND_IN_SET FORMAT INSERT INSTR LCASE LEFT LENGTH LOCATE LOWER LPAD LTRIM MID POSITION REPEAT REPLACE REVERSE RIGHT RPAD RTRIM SPACE STRCMP SUBSTR SUBSTRING SUBSTRING_INDEX TRIM UCASE UPPER Numeric Functions: ABS ACOS ASIN ATAN ATAN2 AVG CEIL CEILING COS COT COUNT DEGREES DIV EXP FLOOR GREATEST LEAST LN LOG LOG10 LOG2 MAX MIN MOD PI POW POWER RADIANS RAND ROUND SIGN SIN SQRT SUM TAN TRUNCATE Date Functions: ADDDATE ADDTIME CURDATE CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURTIME DATE DATEDIFF DATE_ADD DATE_FORMAT DATE_SUB DAY DAYNAME DAYOFMONTH DAYOFWEEK DAYOFYEAR EXTRACT FROM_DAYS HOUR LAST_DAY LOCALTIME LOCALTIMESTAMP MAKEDATE MAKETIME MICROSECOND MINUTE MONTH MONTHNAME NOW PERIOD_ADD PERIOD_DIFF QUARTER SECOND SEC_TO_TIME STR_TO_DATE SUBDATE SUBTIME SYSDATE TIME TIME_FORMAT TIME_TO_SEC TIMEDIFF TIMESTAMP TO_DAYS WEEK WEEKDAY WEEKOFYEAR YEAR YEARWEEK Advanced Functions: BIN BINARY CASE CAST COALESCE CONNECTION_ID CONV CONVERT CURRENT_USER DATABASE IF IFNULL ISNULL LAST_INSERT_ID NULLIF SESSION_USER SYSTEM_USER USER VERSION SQL Server FunctionsĬarrera 22 con Ave. 'Like' should only need to test the first three chars to find a match, whereas '' must compare the entire string. LIKE and ILIKE allow pattern matching within character-based column data. ![]()
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