How do I find my max ID?
SELECT * FROM permlog WHERE id = ( SELECT MAX(id) FROM permlog ) ; This would return all rows with highest id , in case id column is not constrained to be unique. Use this query to find the highest ID in the MySQL table.
How do you get the max number in SQL?
To find the max value of a column, use the MAX() aggregate function; it takes as its argument the name of the column for which you want to find the maximum value. If you have not specified any other columns in the SELECT clause, the maximum will be calculated for all records in the table.
How do you find the maximum value of an array of objects?
Getting the maximum element of an array
- var arr = [1,2,3]; var max = arr. reduce(function(a, b) { return Math. max(a, b); }); The following function uses Function.
- function getMaxOfArray(numArray) { return Math. max. apply(null, numArray); }
- var arr = [1, 2, 3]; var max = Math. max(… arr);
How to pick up a record with max value?
The following will pick up record for the max revision of each date for each employee. select job, adate, rev, usr, typ from tbl where exists ( select 1 from ( select usr, adate, max (rev) as max_rev from tbl group by usr, adate ) as cond where tbl.usr=cond.usr and tbl.adate =cond.adate and tbl.rev =cond.max_rev ) order by adate, job, usr
How to select only rows with Max ID?
Also, I think this is a “must read”: SQL Select only rows with Max Value on a Column Besides Adrian’s and Salman’s approach, there’s alo this one which gives different results when there are ties, two or more rows with same (maximum) id.
How does select ID with Max date work?
As already pointed out by @MadMyche both statements use full table scans since no indices are present. The second query does the scan twice resulting in much higher logical IO. However this performance penalty is compensated with more efficient aggregation in joining.
What to do with Max ID in MySQL?
AND pd_id = (select max (pd_id) from product) GROUP BY pd_title This query is not optimal but it would do the job. Aaahhh, the good old greatest-n-per-group Of course, you should adapt this to your needs accordingly.