使用navicat测试学习: 首先使用set autocommit = 0;(取消自动提交,则当执行语句commit或者rollback执行提交事务或者回滚) 在打开一个执行update 查询 正在执行的事务: SELECT * FROM information_schema.INNODB_TRX 根据这个事务的线程ID(trx_mysql_thread_id): 从上图看出对应的m...三层
Assign a Column name from a dataTable to a table header cell in a table control assign html text box value from code behind using c# Assigning null to an array if array is empty Asynchronous operations are not allowed in this context. Attachment File Path while Sending Email using C# and ...
Unlike with an outbox table, there’s no need to remove messages after they have been consumed from the transaction log. Also, this emphasizes the nature of an outbox being an append-only medium: messages must never be modified after being added to the outbox, which might happen by accident...
"Package failed validation from the ExecutePackage task" error "ResultSet" property not set correctly "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly "Table Lock " option in OLEDB Destination control in SSIS "TCP Provider: An established...
agg(e), array_agg(f), string_agg(g) FROM hugetable GROUP BY a,b HAVING avg(c) > 100.89; and then do some additional processing on the result in some way (subquery, matview, ...). They don't really care about ordering of values in the arrays, as long as ordering of all ...
--Create dummy table with dummy data that has duplicates CREATE TABLE duptest ( first_name character varying(50), last_name character varying(50), mi character(1), name_key serial NOT NULL, CONSTRAINT name_key PRIMARY KEY (name_key) ) WITH (OIDS=FALSE); INSERT INTO duptest(first_name,...
way to prevent UPDATEs from changing the key. Kind of like the table level inverse of FOR KEY UPDATE - a way to say "you can change rows, just cannot add or remove from the set of keys". -- Craig Ringerhttp://www.2ndQuadrant.com/PostgreSQLDevelopment, 24x7 Support, Training & ...
Here is a definition of the previously defined users table: var sqlbox = require('sqlbox'); var User = sqlbox.create({ name: 'user', columns: [ {name: 'name', type: 'string'}, {name: 'age', type: 'integer'}, {name: 'email', type: 'string'}, {name: 'hashedPassword', ...
To use a non-default table or a non-default database, change the item_class attribute of the queue: Postqueue.new do |queue| queue.item_class = MyItemClass end MyItemClass should inherit from Postqueue::Item and use the same or a compatible database structure. Special Ops Postqueue ...