I occasionally need to do a join in my app that goes across multiple tables, but haven’t quite figured out how to do this for more than 3 tables: Currently I’m ready to go: What I would like to do now is to join every consumer that belongs to an OrderListItem. However, when I try the following: I …
Syntax errors while trying to use a select statement as the condition for a while loop in SQL
I have a simple loop I wrote to check if a random id is already in the table, else regenerate it: Running the code above gives the error: and As far as I can tell, no error in the editor. Answer The better approach is to collect all the id’s into a PL/SQL collection, so that you only make one
Union ALL with different number of columns
I have an Employee table with these columns : EmployeeId Fullname Phone Department Team Function Manager and EmployeeHistory containing the history with different columns, but there are some in common : EmployeeId Fullname Email Geolocation Department Team Function Manager How can I union them? Answer Replace…
Where Azure SQL Database logs for failed Data Manipulation SQL queries?
I can find tools in Azure to monitor and get logs on the performance of the Azure SQL database. However, what tools are available in the Azure portal to see logs of failed SQL data manipulation …
SQLite3 Table Only Holds 1 Row
So, I have 2 tables, that I’ve added per the documentation, but something weird happens whenever I try to add a row to them. The data is written into the .db file, but whenever I query it, it only returns the first row. I can still update, and read these rows normally, but any data I write to them, just
Using PIVOT in conjunction with a total summation in SQL
I have some data with a general structure: I want to output a single row like: I can see that the way to approach this is with a PIVOT, but how would I do this whilst also calculating the total? Thank Answer You can use conditional aggregation: Note: If you have values other than ‘X’, ‘YR…
Creating Dynamic SQL Query to join multiple tables?
I have a dataset in SQl which includes huge numbers of tables (more than 2000). Within these tables, I have a main table called ‘main_table’, that includes some parameters and one of them is the key named ‘id’. I have also a table called ‘Tables_name’, which consists of the…
Optimize Merge query inside n^2 loop
I’ve got a merge query that needs to be executed one time for each combination of day and sessionType inside the request ArrayList. I am using nativeQuery to execute it. Is there a way to plain the source data (two ArrayLists, one with a date range instead a single day, and the other with all the sessio…
query to group remarks column with sum of other column in oracle
lets assume i have following table “marksheet”: Now I want it like this: I have tried this. Now, I want to add theory_remarks and practical_remarks as above (table2). Thank you for any help. Answer Assuming userid,subject,type is unique
Dynamic SQL stored procedure and datetime
I have a simple query that I want to convert to dynamic SQL. I have 2 input parameters: a table and a datetime. And the output is the rowcount for the table and this specific datetime. I tried different solutions. I tried the query with execute sp_executesql, I tied to add the the ”’ before and af…