Categories
Database Development

Why are my rows deleted on update?

I have 2 tables, quizzes and quizzes_answers. The former contains questions and the latter contains available answers to this question. Adding some rows in the table quizzes_answers with a quiz_id higher than 3 makes these newly created rows disappear instantly. Updating an existing row to set its quiz_id to a value higher than 3 also […]

Categories
Database Development

Query fails sometimes on casting error

I have a query that can run on the same data set, and sometimes it fails and sometimes it succeeds The query is generated by hive metadata service, and I can’t modify it. This is a simplified version of the query: select “TBLS”.”TBL_ID”, “FILTER0″.”PART_ID”, “TBLS”.”TBL_NAME”, “FILTER0″.”PART_KEY_VAL” from “PARTITIONS” inner join “TBLS” on “PARTITIONS”.”TBL_ID” = “TBLS”.”TBL_ID” […]

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Android User Help

Cannot find which alarm to wake me up

I am using oneplus 6 with Android 10 in OxygenOS 10.3.3. In recent 2 days, I was waked up by the mobile alarm at exactly 08:30 am every morning. However, I cannot find the alarm app which generate this wake-up alarm. I have checked the recent app, there is no app running recently at around […]

Categories
Database Development

Query fails sometimes on casting error

I have a query that can run on the same data set, and sometimes it fails and sometimes it succeeds The query is generated by hive metadata service, and I can’t modify it. This is a simplified version of the query: select “TBLS”.”TBL_ID”, “FILTER0″.”PART_ID”, “TBLS”.”TBL_NAME”, “FILTER0″.”PART_KEY_VAL” from “PARTITIONS” inner join “TBLS” on “PARTITIONS”.”TBL_ID” = “TBLS”.”TBL_ID” […]

Categories
Database Development

Query fails sometimes on casting error

I have a query that can run on the same data set, and sometimes it fails and sometimes it succeeds The query is generated by hive metadata service, and I can’t modify it. This is a simplified version of the query: select “TBLS”.”TBL_ID”, “FILTER0″.”PART_ID”, “TBLS”.”TBL_NAME”, “FILTER0″.”PART_KEY_VAL” from “PARTITIONS” inner join “TBLS” on “PARTITIONS”.”TBL_ID” = “TBLS”.”TBL_ID” […]

Categories
Android User Help

Phone overheats after powering on

I’ve seen this with plenty of smartphones,usually after 1-2 years of use.The phone overheats for a minute or 2 before cooling down,but it’s performance doesn’t differ from a non-overheating phone that has been powered on. Is this simply due to the natural wear and tear which causes a CPU overload for the first few minutes,or […]

Categories
Database Development

How are the system dbs (like msdb, master), agent jobs protected in FCI – failover cluster instance?

In FCI, the database file, log file is shared via shared disk. When one server goes down, then other takes over. The C: where the sql server software installation takes place is not a shared disk. The system dbs get stored in the C: path. How are the system dbs (like msdb, master), agent jobs […]

Categories
Database Development

SQL Server 2019 performance worse than 2012… am I missing something?

We have a SQL Server 2012 server which far outperforms a SQL Server 2019 database on (as far as I can see) the same infrastructure. We are hosting both databases on a cloud platform with the same SLAs. Both have 180GB RAM and 16 processors. However there are a few key differences. The 2012 database […]

Categories
Android User Help

When installing new ROM through fastboot, which .img files must be flashed, with what arguments, and in what order?

I own a Oneplus 7T, which runs Android 10 and therefore has no working TWRP to flash ROMs with. It’s bootloader is unlocked and is rooted. When installing a new ROM, whether it is a custom ROM or an update to the current ROM, I install them by extracting the ROM zip, extracting payload.bin, and […]

Categories
Artificial Intelligence (AI) Mastering Development

Deep reinforcement learning without q-table

What is the best way to train a neural network without having a calculated q-table? sometimes we couldn’t find the right q-table that it solvable by neural network but there are some other answers that it solvable but it doesn’t exist in q-table or we don’t know the way to find that right q-table (we […]