Dbeaver create temporary table3/28/2024 ![]() ![]() I do not know MySQL well (or really at all), so I would recommend looking up the syntax if you are not certain. I expect your timeout issues (server losing connection) is a configurable option in MySQL either in the connection string or on the server itself.īut to JOIN them, I expect it would just be a simple "SELECT FROM temp_A JOIN temp_B ON temp_A.ID = temp_B.ID", but you may need to specify the join type. I have tables with hundreds of millions of rows and even that isn't really that large of data and I haven't had timeout issues. ![]() Now, for efficiency, I have a feeling that is more likely related to indexes as you don't have a lot of rows. So you could just join temp_A on temp_B on the ID column. A quick google confirmed this - "MySQL removes the temporary table automatically when the session ends or the connection is terminated". You can get the name of the current temporary schema (after creating the first temp table) like laid out in the link you added: SELECT nspname FROM pgnamespace WHERE oid pgmytempschema () But your current plan still wouldnt make a lot of sense. Second, my understanding of MySQL is that it keeps the temporary tables in the same way that SQL server does. Version v23.1.13 Temporary Tables CockroachDB supports session-scoped temporary tables (also called 'temp tables'). NOTE: The more efficient the query the better, as the 'temp_A' table has over 280K records and the 'temp_B' table has over 175K observations and I've been having issues with the server losing connection.įirst, I think you would likely get better support on a MySQL forum than a SQL Server forum. Let me know if I didn't explain something properly or you need additional context. I'm pretty sure it's simple, I just can't wrap my head around how to do it. So I want the final output table to look like this: Max_Year ID Var_1 Var_2 Var_3 Var_4 The ultimate goal is to use the 'temp_A' table to bring in the missing rows: ('Var_3' & 'Var_4') and join them back onto the 'temp_B' table. This is what the output table looks like: ID Var_1 Var_2 Max_Year Here is the query: CREATE TEMPORARY TABLE temp_B as Valid only when creating a table from a query ( AS query ), defines column names that map to the query output. If a CREATE TEMPORARY TABLE statement sets knum greater than 0, Vertica returns an warning. This is what the output table looks like: ID Year Var_1 Var_2 Var_3 Var_4įor the second temp table, if unique combos for 'ID', 'Var_1', and 'Var_2' appear in multiple years in the temporary table 'temp_A', I only kept the row with the most recent year and dropped the previous years. The version below avoids all of the hassles of dealing with the s.I just wanted to get rid of non-global temp tables, hence the in my WHERE clause, drop the if you want to drop global temp tables as well, or use a if you only want to drop global temp tables. Eon Mode : Ksafety of temporary tables is always set to 0, regardless of system Ksafety. WHERE isMostRecentSubmission = True) AS b This is the query I used to accomplish this: CREATE TEMPORARY TABLE temp_A as In the first temporary table, I pulled all of the distinct rows from a table called 'Table A' and used a JOIN clause to combine it with a table called 'Table_B' so that I could apply a condition - in this case, I only wanted the most recently submitted records. ![]() The ultimate goal is to join two temporary tables. I'm still pretty new to SQL and could use some help getting this query to work. ![]()
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