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LISTAGG in Oracle to return distinct values
...d the code- and got the error message as below ORA-01489: result of string concatenation is too long 01489. 00000 - "result of string concatenation is too long" *Cause: String concatenation result is more than the maximum size.
– Priyanth
Jul 17 '12 at 12:2...
Fastest way to check if string contains only digits
...; int r = 12345678*2; var ss = new SortedSet<string>(); //s = string.Concat(Enumerable.Range(0, 127).Select(i => ((char)i ^ '0') < 10 ? 1 : 0));
w.Restart(); for (int i = 0; i < r; i++) b = s.All(char.IsDigit); w.Stop(); ss.Add(w.Elapsed + ".All .IsDigit");
w.Restart(); for (...
How to do a regular expression replace in MySQL?
...= SUBSTRING(original,i,1);
IF NOT ch REGEXP pattern THEN
SET temp = CONCAT(temp,ch);
ELSE
SET temp = CONCAT(temp,replacement);
END IF;
SET i=i+1;
END LOOP;
ELSE
SET temp = original;
END IF;
RETURN temp;
END$$
DELIMITER ;
Example execution:
mysql> select regex_replac...
Repair all tables in one go
...ry to print REPAIR SQL statments for all tables inside a database:
select concat('REPAIR TABLE ', table_name, ';') from information_schema.tables
where table_schema='mydatabase';
After that copy all the queries and execute it on mydatabase.
Note: replace mydatabase with desired DB name
...
Throw an error in a MySQL trigger
...
declare msg varchar(128);
if new.id < 0 then
set msg = concat('MyTriggerError: Trying to insert a negative value in trigger_test: ', cast(new.id as char));
signal sqlstate '45000' set message_text = msg;
end if;
end
//
delimiter ;
-- run the following as seperate sta...
Get Substring - everything before certain char
...have moved on a bit since this thread started.
Now, you could use
string.Concat(s.TakeWhile((c) => c != '-'));
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How can I generate random alphanumeric strings?
...
@Adam: Yes, you could concat the result of multiple calls to GetRandomFileName but then (a) you'd lose your performance advantage, and (b) your code would become more complicated.
– LukeH
Aug 28 '09 at 9:08
...
How can I use “sizeof” in a preprocessor macro?
...produces p__LINE__ as a variable. You would need a preproc macro and use __CONCAT from sys/cdefs.h .
– Coroos
Mar 2 at 11:37
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Generating a random & unique 8 character string using MySQL
...umber plate
SELECT @lid:=LAST_INSERT_ID();
UPDATE vehicles SET numberplate=concat(
substring('ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', rand(@seed:=round(rand(@lid)*4294967296))*36+1, 1),
substring('ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', rand(@seed:=round(rand(@seed)*4294967296))*36+1, 1),
substr...
Remove the last three characters from a string
...to remove a certain number of characters from the end of a string:
string.Concat("hello".Reverse().Skip(3).Reverse());
output:
"he"
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