Tag: sql-delete

DELETE entry that is older than current datetime in MySQL

I have tried the following among various other statements but thought one of these should obviously work but no luck so far. Please tell me what I’m doing wrong. Not getting an error, it’s just not working. DELETE FROM table_name WHERE from < NOW() DELETE FROM table_name WHERE from < ‘2022-04-16 08:00:00’ Example Answer You shouldn’t name your columns (or

T-SQL :: TRUNCATE or DELETE all tables in schema

I need to TRUNCATE or DELETE all tables in schema. I found this code: but on AdventureWorks it gives me: So I found this alternative code: But the result is the same: How to TRUNCATE or DELETE all tables in schema? Answer You simply need to wrap your “delete from all the tables” script with a “drop all foreign keys”

Query to delete record when no matching in delta table

please help to write a better delete query. DB2 does not have “not matched by source” with merge. Need to delete rows which does not have matching codes from source file for an ID and need to delete rows only for the ID’s present in source file. sample data row with value ID=1 & code=IJK alone need to be deleted

Delete Rows which are fetched by a select query joining several tables

I have written the following select: What I want to do: I want to delete the rows in reminder, which are fetched by the described select. What I tried: Result: 00907. 00000 – “missing right parenthesis” I wonder if i can basically delete these rows in this manner. I also tried ‘exists’ resulting in the same error. Any suggestions? Thanks

Delete rows from 2 tables using a single query

I have the following database-schema: I have the following example data: CREATE TABLE computermapping ( ComputerMappingID int NOT NULL, PrinterGUID char(36) NOT NULL, ComputerGUID char(36) NOT …

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 snapshot_date and per device_id (column type is “timestamp without time zone”)

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 Answer Assuming that the primary key of your table is id,

Delete a task stored in SQL database through html form using Python

This is a web app written in Python to add and delete tasks. This is the add_tasks function: @app.route(“/add”, methods=[“GET”, “POST”]) @login_required def add(): …

SQLite Delete row from Table A when columns are referenced as FOREIGN KEYS in other Tables B, C, etc

mysql query question about removing data from columns

This is what the table looks like right. I only want to delete the data in the two columns on the right. So let’s say i want to delete the first row Aheadworks_AdvancedSearch columns on the right. I’m sorry i’m horrible in mysql. Would this be the right syntax? How can i combine as well? Answer As commented by Strawberry,