Skip to content
Advertisement

Tag: sql-delete

Postgresql delete multiple rows from multiple tables

Consider 2 or more tables: I wish to delete all users and their orders that match first name ‘Sam’. In mysql, I usually do left join. In this example userid is unknown to us. What is the correct format of the query? Answer http://www.postgresql.org/docs/current/static/sql-delete.html You can also create the table with ON delete cascade http://www.postgresql.org/docs/current/static/ddl-constraints.html

Delete with “Join” in Oracle sql Query

I am not deeply acquainted with Oracle Sql Queries, therefore I face a problem on deleting some rows from a table which must fulfill a constraint which includes fields of another (joining) table. In other words I want to write a query to delete rows including JOIN. In my case I have a table ProductFilters and another table Products joined

Multiple LEFT JOIN in Access

I have the following query, which works for MySQL: But it doesn’t work for MS Access. I’ve tried to add parentheses around the LEFT JOIN, but it gives me syntax error in FROM clause. So how should this query look in order to work in MS Access? Answer The Access DELETE requires a star (*): DELETE * FROM … In

Delete all records except the most recent one?

I have two DB tables in a one-to-many relationship. The data looks like this: Resultset: I want to delete all applications except for the most recent one. In other words, each student must only have one application linked to it. Using the above example, the data should look like this: How would I go about constructing my DELETE statement to

Advertisement