In MySQL group by does an implicit order by ASC. This is great if you wanted to add an ORDER BY ASC because then the results are already ordered.开发者_StackOverflow社区
I have a block of Oracle SQL code that does work. I figured out I cannot get the cert column and the max(run_time) at the same time.
I have a form which sends selected values from a checkbox list to a php script this way: $selected_languages=$_POST[\"selected_languages\"]; // --> \"en-GB,it,fr\"
So I\'m trying to count the number of parts, number of tasks, the quantity in each job and the time that it took to manufacture each job but I\'m getting some funky results. If I run this:
I have 3 t开发者_如何学JAVAables: Orders - id - customer_id Details - id - order_id - product_id - ordered_qty
I am using the开发者_JS百科 below query to list the number of transactions by month. Does anyone know how can I list by year too. This means that the query returns all my transactions for the whole ye
Is there a performance difference when grouping by different data t开发者_开发问答ypes? For instance, if I group by INT, will I get better performance than if I group by varchar?I would say GROUP BY I
I have a table with the following schema: CREATE TABLE `wordtrend` ( `oid` bigint(20) NOT NULL AUTO_INCREMENT,
I want to group results by day: max value for each of the the last 30 days. I came up with : select max(value), DATE(time) from table where time>DATE(\'now\', \'-30 days\') group by DATE(time);
I have a watchlist system that I\'ve coded, in the overview of the users\' watchlist, they would see a list of records, however the list shows duplicates when in the database it only shows the exact,
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