In this case we’re locking all non-Innodb tables… I wonder what does it mean in practice and how it plays with servers which have very large amount of tables…. Do you do information_schema query as part of that logical operation to discover all those tables ? Do we when have one ...
Fault-tolerant executionin Trino is disabled by default; you can enable it by setting a retry policy in the Amazon EMR configuration. Trino supports two types of retry policies: QUERY– The QUERY retry policy instructs Trino to retry the whole quer...
How to check email address already exist in MongoDB database ? How to check for duplicate? How to check for same value in collection of objects How to check if a window.locaton.href is successful loaded? How to check if form authentication cookie has expired in your custom authorize How ...
Approximately 70 percent of respondents using MongoDB are running more than 100 databases, 30 percent are running more than 500 databases, and nearly 60 percent work for companies with more than 5,000 employees. Sixty percent of respondents currently using Hadoop are running more than 100 databases...
SQL subqueries on employee Database, Practice and Solution: From the following table, write a SQL query to find those departments where the average salary is less than the averages for all departments. Return department ID, average salary.
Nothing is more frustrating than being put on hold or being switched around endlessly when you need the help of a real human. And tax season is stressful enough without the outright warfare it takes to get an IRS employee on the phone. Last year the wait times were reported to be up to...
Explanation: The said query in SQL that returns all the rows and columns from the 'employees' table where the "salary" column is less than 1000, and sorts the result set in ascending order on "salary" column. Relational Algebra Expression: ...
如果你觉得不需要使用版本管理系统,那我们沟通会有代沟,如果你是cvs、svn的粉丝,或者由于某种原因没有使用过分布式版本管理系统,比如git,那强烈建议你去看一下“why git is better than x”。 2:一键式发布 这里发布的目标位置,既可以是开发机,做本地测试;也可以是测试机,为QA准备好捉虫游戏的森林;还可以是生产...
We can probably change our schemas to require less fractal querying, or see whether MongoDB allows some kind of query that would allow that object to be composed on the DB side, instead of doing tons of incremental queries. Contributor Author jglamine commented Aug 27, 2017 Yeah, I don'...
There is some filtering done, but we have made multiple checks and we are sure that there are more than three entries that satisfy the filter condition. Maybe it's also noteworthy that the problem seems to happen only for specific input vectors. Depending on the query vector, all 3 entries...