WebFeb 4, 2024 · Another way you can handle this that would minimize downtime (assuming the majority of the data is being deleted) is you can INSERT everything within the last month into a new Table.DROP the old Table, and use sp_rename to instantly rename your new Table to the old Table's name.. For example: SELECT * INTO NewTable FROM … WebTo delete records from a table that have a datetime value in Date_column older than 30 days use this query: USE Database_name; DELETE FROM Table_name WHERE …
How to Delete Large Amounts of Data – SQLServerCentral
WebOct 9, 2024 · In MySQL, you can do this using a join: delete t from t join (select source, min (date) as mindate from t group by source ) tt on t.source = tt.source where t.date > tt.mindate; The only way -- off-hand -- that I can think to make this more efficient is to store the aggregation result in a subquery and add an index to it. WebJun 9, 2024 · We first append the data from the SQL database to the history file. To filter out the duplicate data we need to sort the data on the column that is the keyfield for that record and sort on the query date. I hope you can apply this in you case. Greetings, Dirk. Proposed as answer by Ehren - MSFT Microsoft employee Tuesday, May 23, 2024 11:41 PM la vie - a colors show
SQL DELETE - W3School
WebDec 4, 2015 · SQL & PL/SQL. New Post. Deleting Rows older than 60 days without any date Column. 975743 Dec 4 2015 — edited Dec 7 2015. Hi , I am looking for a query or script to delete rows older than 60 days from a table without DATE column. I have to set this for every week as autojob/crontab job.. I am thinking about rownum which may help me. WebSep 19, 2024 · Delete rows that match these ROWIDs. The query looks like this: DELETE FROM table a WHERE a.ROWID IN (SELECT ROWID FROM (SELECT ROWID, ROW_NUMBER() OVER (PARTITION BY unique_columns ORDER BY ROWID) dup FROM table) WHERE dup > 1); The ROW_NUMBER function here is used as an analytic function. WebDec 3, 2024 · Deleting large portions of a table isn't always the only answer. If you are deleting 95% of a table and keeping 5%, it can actually be quicker to move the rows you want to keep into a new table, drop the old table, and rename the new one. Or copy the keeper rows out, truncate the table, and then copy them back in. k1 2020 instructions