I have this SQL query: SELECT NumeroReloj, Badgenumber, Name, lastname, DEFAULTDEPTID FROM [PBS].[dbo].[CAT_Empleados] RIGHT JOIN [AccessControl].[dbo].[USERINFO] ON [PBS].[dbo].[CAT_Empleados].[…
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 …
SQL Server – Deleting rows between a date range using SQL. Date conversion fails
This is the DELETE statement I wrote. There is an error that says: Conversion failed when converting date and/or time from character string. I know I have to write the correct date format, but I am not sure how that goes. This question has not been answered elsewhere because the answers I saw did not specify …
How can I delete using INNER JOIN with SQL Server?
I want to delete using INNER JOIN in SQL Server 2008. But I get this error: Msg 156, Level 15, State 1, Line 15 Incorrect syntax near the keyword ‘INNER’. My code: Answer You need to specify what table you are deleting from. Here is a version with an alias:
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…
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 *…
Best way to delete millions of rows by ID
I need to delete about 2 million rows from my PG database. I have a list of IDs that I need to delete. However, any way I try to do this is taking days. I tried putting them in a table and doing it in batches of 100. 4 days later, this is still running with only 297268 rows deleted.
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 con…
Keep only N last records in SQLite database, sorted by date
I have an SQLite database that I need to do the following: Keep only last N records, sorted by date. How do you do that? Answer To delete all but the latest 10 records.