The opposite of REGEXP_LIKE in Oracle is REGEXP_INSTR. REGEXP_LIKE is used to determine if a string matches a specified regular expression pattern, while REGEXP_INSTR is used to find the position of a substring within a string that matches a specified regular expression pattern. In essence, REGEXP_LIKE is used to check for a match, while REGEXP_INSTR is used to find the location of a match within a string.
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How to reverse the logic of regexp_like in Oracle?
To reverse the logic of regexp_like in Oracle, you can use the NOT operator (!) in conjunction with regexp_like.
For example, if you have a regular expression pattern that matches a specific pattern, you can reverse the logic by using the NOT operator as follows:
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SELECT * FROM table_name WHERE NOT regexp_like(column_name, 'pattern'); |
This query will return all rows where the column value does not match the specified pattern. This is equivalent to reversing the logic of regexp_like.
What is the contrary function to regexp_like in Oracle?
The contrary function to regexp_like in Oracle is regexp_not_like. This function is used to check if a string does not match a specified regular expression pattern.
What is the alternative to regexp_like for negative matching in Oracle?
The alternative to REGEXP_LIKE for negative matching in Oracle is to use the NOT operator combined with a regular expression condition. For example, to perform negative matching using a regular expression in Oracle, you can use the following syntax:
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SELECT * FROM your_table WHERE NOT REGEXP_LIKE(your_column, 'your_pattern'); |
This will return all rows where the specified column does not match the specified regular expression pattern.
How to perform a not pattern match with regexp_like in Oracle?
To perform a not pattern match with REGEXP_LIKE in Oracle, you can use the following syntax:
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SELECT column_name FROM table_name WHERE NOT REGEXP_LIKE(column_name, 'pattern'); |
In this query, replace column_name with the name of the column you want to match against and table_name with the name of the table. The 'pattern' parameter should be the regular expression pattern you want to negate. The NOT keyword before REGEXP_LIKE will invert the pattern match, returning rows that do not match the specified regular expression pattern.
For example, if you want to find all rows where the column 'name' does not contain the letter 'a', you can use the following query:
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SELECT name FROM employees WHERE NOT REGEXP_LIKE(name, 'a'); |
This query will return all rows from the 'employees' table where the 'name' column does not contain the letter 'a'.
