The answer to this question is much easier now: – Use Row Based Replication and Read Committed isolation level. The locking you were experiencing disappears. Longer explaination: http://harrison-fisk.blogspot.com/2009/02/my-favorite-new-feature-of-mysql-51.html
unordered_map::insert copies or moves a key-value pair into the container. It is overloaded to accept reference-to-const or an rvalue reference: std::pair<iterator,bool> insert(const std::pair<const Key, T>& value); template<class P> std::pair<iterator,bool> insert(P&& value); unordered_map::emplace allows you to avoid unnecessary copies or moves by constructing the element in place. It uses perfect forwarding and a variadic template to … Read more
Maybe I read the problem wrong, but I believe you already have inserted the course 11 records and simply need to update those that meet the criteria you listed with course 6’s data. If this is the case, you’ll want to use an UPDATE…FROM statement: UPDATE MyTable SET complete = 1, complete_date = newdata.complete_date, post_score … Read more
You can use the INSERT … SELECT statement to get the MAX()+1 value and insert at the same time: INSERT INTO customers( customer_id, firstname, surname ) SELECT MAX( customer_id ) + 1, ‘jim’, ‘sock’ FROM customers; Note: You need to drop the VALUES from your INSERT and make sure the SELECT selected fields match the … Read more
wrap all INSERTs in a transaction, even if there’s a single user, it’s far faster. use prepared statements.
Put the date in single quotes and move the parenthesis (after the ‘yes’) to the end: INSERT INTO custorder VALUES (‘Kevin’, ‘yes’ , STR_TO_DATE(‘1-01-2012’, ‘%d-%m-%Y’) ) ; ^ ^ —parenthesis removed–| and added here ——| But you can always use dates without STR_TO_DATE() function, just use the (Y-m-d) ‘20120101’ or ‘2012-01-01’ format. Check the MySQL … Read more
You can get the first child of the body element with the firstChild property. Then use it as the reference. const p = document.createElement(“p”); p.textContent = “test1”; document.body.insertBefore(p, document.body.firstChild); I modernized your code for reasons 🙂
there’s a better way # Larger example rows = [(‘2006-03-28’, ‘BUY’, ‘IBM’, 1000, 45.00), (‘2006-04-05’, ‘BUY’, ‘MSOFT’, 1000, 72.00), (‘2006-04-06’, ‘SELL’, ‘IBM’, 500, 53.00)] c.executemany(‘insert into stocks values (?,?,?,?,?)’, rows) connection.commit()
You can cast it to a list, insert the item, then cast it back to a tuple. a = (‘Product’, ‘500.00’, ‘1200.00’) a = list(a) a.insert(3, ‘foobar’) a = tuple(a) print a >> (‘Product’, ‘500.00’, ‘1200.00’, ‘foobar’)
Use numeric literals with aliases inside a SELECT statement. No () are necessary around the SELECT component. INSERT INTO qa_costpriceslog (item_code, invoice_code, item_costprice) SELECT /* Literal number values with column aliases */ 1 AS item_code, 2 AS invoice_code, item_costprice FROM qa_items WHERE item_code = 1; Note that in context of an INSERT INTO…SELECT, the aliases … Read more