What’s the best way to check if the VARIANT TYPE with JSONs with value similar to TIMESTAMP_NTZ has correct format? For example, this is the correct format that I would like to have but there are times when it looks different in database, like this I would like to detect records which are in a different format than the reference.
Tag: rdbms
Getting an output based on conditions and creating a new column and updating it based on a condition in SQL
We have two tables: “riders” and “drivers”. Some riders are also drivers, so will show up on both tables. Each table looks like this: Table riders I have tried this code: Write a query that outputs all SF riders and add a column called ‘flag’ that prints ‘true’ if the rider is also a SF driver and ‘false’ if the
Can we access a record in SQL table using primary key in O(1) time?
I want to know that while finding a record using the primary key does RDBMS takes O(1) time or not? Answer No. In all databases that I know of, the primary key index is a B-tree index. Finding a particular element in such an index is an O(log n) operation, not O(1). Note that for the sizes of databases, O(log
How to select from table A only where a relationship between the table A row and a specific row in B exists? [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 1 year ago. Improve this question lets say I have two MySQL tables, table A and table B. Each table has a primary key called id
how to add select statement in IN clause in pivot
iam using pivot table in SQL query.. i need to make some columns as rowss, but i need to use select statement in IN clause where we givt option like this normally we give option like but with select statement its giving me error?? what can be done. Answer use this i got answer from some of google posts
JOIN with 3 tables, and MAX value for a column combination
I have 3 tables with name USER, SCORE and LEVEL as given below. From these tables, I’m trying to prepare a scoreboard, in which each user will be arranged based on their level, and score. And for each user, only highest level and corresponding highest score in that level will be shown. I have written a JOIN query as below
List only repeating names
| personid | first | last | section | | 1 | Jon | A | y3 | | 2 | Bob | Z | t6 | | 3 | Pat | G | h4 | | 4 | Ron | Z | u3 | | 5 …
Symmetric Pair in SQL with JOIN
I am trying to find the name of students where a symmetric pair exists. There are 3 tables: Edit from your comment: A student is called as being a part of a symmetric pair if the marks obtained by that student in science is equal to the marks obtained by some other student in mathematics and the marks obtained in
The most efficient method of performing a large number of similar SELECT queries on PostgreSQL?
I have a set of large tables with many records each. I’m writing a Python program that SELECTs a large number of records from these tables, based on the value of multiple columns on those records. Essentially, these are going to be lots of queries of the form: Each table has a different set of columns, but otherwise the SELECT
Why does the number of tuples selected vary in these queries
I am new to DBMS and SQL. While practicing some basic queries i had come across this doubt. Suppose this query’s result is null:select * from table2 b where b.age>50; i.e. there is no age in table2 …