In MariaDB, ADDDATE() is a built-in date and time function that performs date arithmetic.
It allows you to change a date by specifying the date, the unit to add, and the amount to add. You can pass a negative amount if you need to subtract the date by a certain interval.
ADDDATE() also has a shortcut syntax that allows you to add a given number of days to the date.
In MariaDB, DATE_ADD() is a built-in date and time function that performs date arithmetic.
It allows you to change a date by specifying the date, the unit to add, and the amount to add. You can pass a negative amount if you need to subtract the date by a certain interval.
Starting from MongoDB 4.4, we can now hide indexes from the query plan. This enables us to evaluate the potential impact of dropping an index without actually dropping the index.
If hiding it has a negative impact, we can unhide the index. This saves us from having to drop the index, then recreate it again.
Below are 3 ways to hide an index in MongoDB.
If you’re trying to use OPENROWSET to run an ad hoc distributed query in SQL Server, but you keep getting an “incorrect syntax” error, and you just can’t see anything wrong with your syntax, it could be that you’re trying to use a variable for one of the arguments.
As mentioned in the title of this post, OPENROWSET does not accept variables for its arguments.
If you’re using variables as arguments, try changing these to string literals.
In MariaDB, the REGEXP_REPLACE() function replaces occurrences of the substring within a string that matches the given regular expression pattern.
The whole string is returned along with the replacements.
If there’s no match (i.e. the input string doesn’t contain the substring), the the whole string is returned unchanged.
In MariaDB, the REGEXP_SUBSTR() function returns the substring that matches the given regular expression pattern.
If there’s no match (i.e. the input string doesn’t contain the substring), the result is an empty string.
In MariaDB, the REGEXP_INSTR() function returns the starting index of a substring that matches the regular expression pattern.
The index starts at 1. If there’s no match, the result is 0.