Let’s say I have this table: employeetable: empid joindate location HRupdatedate Changes 1 2002-01-05 Delhi 2021-03-01 New 2 2009-09-09 Mumbai 2021-03-05 New 1 2010-06-27 Hyderabad 2021-03-03 Transfer 2 2015-11-02 Delhi 2021-03-06 Transfer 3 2020-01-01 Mumbai 2021-03-06 New 4 2007-07-30 Delhi 2021-03-04…
Tag: duplicates
Deleting rows in sql rows based on pair value
I have SQL test table as below: Item Doc_No Code Line_Item 1 abc1234 101 01 2 abc1234 102 01 3 def5678 101 01 4 def5678 102 01 5 ghi1234 101 01 6 ghi1234 101 02 7 jkl5678 101 01 I am trying to eliminate rows when duplicate values of “Doc_No” has pair values of “101” and “102̶…
mysql Duplicate entry error for primary key with similar values
This is how i created my table, i have composite key columns. now, im trying to insert this two values that are the same except for the last character ‘t’: value1 = testbtc:testusd value2 = testbtc:testusdt output error: it just makes no sense, they are not duplicated, is something missing on my t…
Get total count of duplicates in column
I need a query to count the total number of duplicates in a table, is there any way to do this? If I have a table like this: I can’t use SELECT COUNT(quantity) because it returns 2. (40 | 29) How can I return 5? (40 | 40 | 29 | 29 | 29) Answer Using analytic functions:
How to keep only one entry among several in PostgreSQL database
I have a database that monitors a network (snapshots table, that contains a snapshot_date column). This production database was flooded by a faulty crontab, resulting in many snapshots for the same device every day. I don’t won’t to remove everything, but i want to keep only one snapshot per snaps…
Delete all duplicates except first one mysql
I have a table with a column serial_number that is repeated a few times. How would I delete the entire row except the first duplicate? By the following, I can select all the duplicates. But can’t delete. SELECT serial_number, COUNT(*) FROM trademark_merge GROUP BY serial_number HAVING COUNT(*) > 1 An…
How to find duplicate records in MySQL, but with a degree of variance?
Assume I have the following table structure and data: I’d like to be able to find duplicate transactions where the description and amounts match, but the date would have some degree of variance +/- 3 days from each other. Because the “Burger King” transactions are within three days of each o…
How can I find duplicate records in clickhouse [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 1 year ago. Improve this question I want to know how I can find duplicate data entries within one table in clickhouse. I am act…
Selecting values from different columns in rows with the same ID
I have a table called COURSE_SELECT that shows students and which online products they will be able to access, but each product is in a different row, even when each of them has their own column. Table: COURSE_SELECT The vendor needs me to send a CSV file with only one row per student, like this: I have no id…
Most efficient way to delete duplicate entries from MySQL tables
We have a table (let us call it originalTbl) that has duplicate entries that we want to delete. By duplicate I mean all values other than an AUTO INCREMENT index field are the same. One way to do this is to create a new table, like the existing table (let us call it uniqueTbl), and then have a query like: