I’m trying to use three projections in same query like below in a Druid environment: But instead I get an error saying – Unknown exception / Cannot build plan for query It seems to work perfectly fine when I put just one count(distinct) in the query. How can this be resolved? Answer As the Druid d…
Tag: database
Is there a way to update ONLY field.type data onto SQL using dbWriteTable? Without having to pass the whole table’s value
So pretty much I am pulling a whole table from my database using: So this pulls my data as I need. After that perform some tests and to check the size of each column. I reassign field types based on my test. After that I would send the data back to the database using: Because I am not manipulating any
MySQL query shows something like 0x8081 instead of special characters
When i run SELECT CHAR(128,129,130,131,132,133,134,135,136,137); I got 0x80818283848586878889 istead of Çüéâäàåçêë. Does anybody know why? I’m using charset utf8mb4. When I run show variables like ‘%char%’; I got I’m using MySQL version 8.0.26 Answer The output charset is “DOS We…
Postgresql: How do I use dynamic values when searching jsonb array of objects?
I am currently trying to build a query for finding specfic object within a jsonb array. I have the following query which works fine if I used a hard coded string for the “game” value e.g. However, if I use a dynamic value like I currently do for username, I get invalid json syntax error. e.g. How …
sql: Calculate the correlations and convert rows into columns
So my current table has more than 100 fields and I am trying to calculate the correlations between the input variables and output variable, and then convert all those columns into rows. For example, my current table looks like this: input_1 input_2 output 3 6 5 4 7 5 6 4 4 6 9 3 7 10 5 9 9
SQL: calculate the sum of each column and convert them into rows
My current table includes more than 100 columns and I need to calculate the sum of each column and convert them into rows. Since there are more than 100 column, it is not convenient to use the unpivote clause. Is there any other way to do that? Below is a snapshot of the original table: col1 col2 23 44 33
Can I connect a openCart project with mobile app? [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed last year. Improve this question my English doesn’t well, I am sorry I have a open Cart project this project have own dat…
How do I reset a MySQL column in a table every year?
I have a column named lv_casual in a table called tbl_employees. I need to reset the column to 0 at a specific date every year. Answer You can use MySQL event schedule. Providing an example below. You have to enable the schedular first Then create the event Check MySQL document for creating event
How to select all enteties grouped by common propertie without loop?
Is there any way to fatch all entities from table grouped by common property while loop? Table storage looks like this and final result supposed to look like this What i want is this: Select each record grouped by category id. It means, if table size is 3200, i need to select all of 3200 records grouped by ca…
How do i link different rows of database into buttons and display the appropriate informations?
Below is the php page and code i created to display information from two rows of the database. This is the picture of my database. And this is the code and page where the user will be redirected to after clicking the ‘More Information’ button. What I am actually trying to do is to make the booking…