I am using the AWS SDK to execute Amazon Athena queries using Java and what I would like to do is to have some way of ensuring only SELECT queries are executed. This is to make sure queries like DROP or INSERT are not executed. So is there any way I can perform this check using the AWS SDK without
SQL command not properly ended in Python OracleSQL
I’m having some trouble with SQL code that works when I run it in DBeaver, but when I execute it with cx_Oracle it comes up with the error of: The python code is good, but I’m not much of a SQL programmer, so maybe someone can look to see if there is any obvious coding errors. It’s just weir…
How to decompose the tables for optimal querying
Suppose I have three tables Actor, Movie, Producer with following attributes Actor(Id,ActorName,Bio) Producer(Id,ProducerName,Bio) Movie(Id,Name,Description,ActorName,ProducerName) There can be many actors in a movie and actor can act many movies, same goes with producer. How to effectively decompose/create n…
casting date within a to_char function?
How can I cast a date or timestamp column to date within a to_char function? But I need to cast the date_column to date first but am unsure Thanks Answer TO_CHAR, as you are using it above, appears to be Oracle code. MySQL uses the DATE_FORMAT function:
Select Min() and other columns and GroupBy by two columns in EF 6
Using the example below, (from the answer in this link here) how can I select/group with an extra column ? I have searched this site and others and tried some examples but couldn’t get it to work. Answer It sounds like what you want would be: Then in the .Select() This groups on distinct combinations of…
raise notice update query result in postgresql
How can I log if field is got updated or not using RAISE NOTICE or some other command if available. Error: Answer I could something like below, but I am not sure if there another UPDATE query followed by current one, ROW_COUNT will hold new result;
Copy all values from source table to destination table dynamically in SQL Server. If there is some value in destination table then delete and insert
I have created 2 tables and populated the values in my source table. Now, I want to populate these values into the destination table dynamically and also check if there is any value in the destination table then delete all those values and insert them from the source. This is my approach which is not executin…
How can I insert a value from another table to another on insertion?
I have this table called users. Whenever I sign up a user, I generate an UUID for him. When this UUID is generated I want to insert a row in another table called health, with the same UUID that was inserted on the users table. I was trying to make this way, but I can’t make it work: I’m having
Missing rows in full outer join
I am trying to count how many users are observed on each of the 3 consecutive days. Each of the 3 intermediate tables (t0, t1, t2) has 2 columns: uid (unique ID) and d0 (or d1 or d2, which is 1 and indicates that the user is observed on that day). The following query: produces this output from spark.sql(q).to…
How to improve a mysql COUNT query for speed?
How can I improve this query for speed? at the moment it’s taking a couple of seconds only to load the php file where the query is without even querying anything. I’ve an index on skillsTrends, jobtitle and industry. Collation: utf8mb4_unicode_ci Number of records < 1,000,000. Answer Try this c…