have the following two sample tables
order amount is equal to orderinfo price*count in the table, and each order has more than one item.
how can I get the top 10 users with the total amount of orders through the SQL statement?
add: each user may also have multiple orders
order
orderinfo
add an extra field in the order table to store the total amount of orders with appropriate redundancy to facilitate query
I want to optimize a sentence about group by. I don t know where to start. I want to find a train of thought . SELECT adv_id, network_id, SUM(re_click) AS clk, SUM(deny_click) AS dny_clk, SUM(re_conver) AS re_ins, SUM(mat_conver) AS mat_ins, SUM(def_...
ask God to help me translate this native SQL statement into TP5 thank you! It is Db:: ( name )-> this kind of chained operation select a.id, a.titlerect a. Createwriting time as answer_count from fa_question a. Isometric solvepaper count (b.qid) as ...
I have a vegetable chicken at the front end. Recently, there is a new demand for the company s project, which has been maintained by others before. the front end uses a framework built by pHp and uses the memcached plug-in. After the project runs, ,...
The basic logic of the program is as follows: execute "LOCK TABLES auto_table WRITE "; then "select ID from auto_table; then update ID+1 " UPDATE auto_table set ID=ID+1 "; finally execute " UNLOCK TABLES " but this logic occurs when two users r...
php calls the stored procedure, and there is other execution code before and after the stored procedure, in the same transaction, but the code before and after the stored procedure is executed, but the code in the stored procedure is not executed. What i...
this is a function of asking and answering questions questions asked by users in Table A questions answered by users in Table B Table An is the only question corresponding to ID, Table B PID corresponds to Table An ID users answer which question PI...
the code is as follows $num = M ( log )-> where ( "date_format (create_time, %Y-%m ) = $date ")-> count ( id ); for($i = 0; ($i+5000)<=20000;$i += 5000){ $datas = M( credit_log )->where("date_format(create_time, %...
for example: I have a table T1 in which there is a comment named name name field select name from T1 that gets array (). [0]=array( name => 123 ), [1]=array( name => 236 ) ) how to change the above name to name ...
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when learning the knowledge of mysql penetration, the attempt to read the file on disk D with sql statement failed as follows: root@host after testing, the value of secure-file-priv is not valid even if it is empty. mysql,apache is running normal...
backend PHP sends the submitted data to Filter submit data: "> < script > alert ( 1 ) < script > Filter (equivalent to conversion via htmlspecialchars): "> < script > alert ( 1 ) < script > name varchar (255) description text prom...
as shown in the figure, how to get to the quotation marks on both sides of the queue and return the data in array format ...
after the order exceeds a certain time, the user does not confirm the receipt, so the system needs to automatically complete the confirmation operation, that is, to change the status of the order. Do you have any good ideas? I have seen before that so...
like Table Fields id typeid article id userid user id status like status 1: liked 0: not liked I want to know that the id of an article is the total number of likes of 1br 2 code 3 group by typeid 4. I don t know how to use tp5 to write Native ...
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< H2 > hierarchical relationship table (processed using baum) < H2 > when the distributor buys, the performance automatically adds up to all his superiors monthly performance the settlement method determines whether the minimum settlement ra...
it is necessary to build a php integrated development environment on this machine. Whether it can be deployed in the cloud can be found directly through the public network ip! ...
A a_id a_title a_key a_desc a_pid 1 A A A 1 B b_id b_title b_key b_desc b_pid 1 b 2 C c_id c_title c_key c_desc c_pid 1 $title= Ctitile || ...
SessionHandler.php the contents of the file are as follows <?php namespace Dry Base; class SessionHandler{ private $pdo = null; private $lifeTime = 1440; public function __construct($pdo) { $this->pdo = $pdo; ...