sql - How to speed up querying records on a timestamp ...
ウェブ6 日前 · 1 Answer. Sorted by: 2. Is there a way to use indexes to make this faster? create index on films (begins,ends) include (id,title); And once you analyze your table, this: explain analyze verbose. SELECT * from FILMS. WHERE begins >= Now()::timestamp - INTERVAL '3 days' . AND ends < now()+'5 hours'::interval. ORDER BY . CASE .
mysql - How to SELECT by MAX(date)? - Stack Overflow
ウェブ5 日前 · 13 Answers. Sorted by: 64. This should do it: SELECT report_id, computer_id, date_entered. FROM reports AS a. WHERE date_entered = ( SELECT MAX(date_entered) FROM reports AS b. WHERE a.report_id = b.report_id. AND a.computer_id = b.computer_id.
sql - Schema query changes execution time with larger ...
ウェブ2 日前 · The following SQL query which runs from an open source library I'm using finds the foreign key constraints within a schema/table. However the PG optimiser changes the way it optimises the query based upon the number of tables in the SCHEMA. Does anyone know if there is a way to force the use of the faster optimisation method?
LocalDateTime - issue in time display in database - Stack ...
ウェブ4 日前 · For columns of a data type akin to the SQL standard type TIMESTAMP WITHOUT TIME ZONE, you must use the Java class LocalDateTime. In Oracle Database: TIMESTAMP type. See Oracle Database documentation .
Massive insertion with JMeter and oracle sql - Stack Overflow
ウェブ5 日前 · Basically, I have a dump file with lots of rows of data and I'm testing what transaction values per second I can get. My goal was to reach, for example, 20,000 transactions per second, but I can't exceed 7,000. (Also i'm runing the test plan for about 16 mins and inserting around 7 milions of lines). In JMeter I'm playing with the ...
T-SQL - Identify and label each branch in a hierarchical structure
ウェブ3 日前 · My goal is to find the most efficient way to populate the 'Group_Id' column like in the following example: Where Closed_By_Entry_No is the Parent_Id and Entry_No is the Child_Id and the Parent_Id of the top-most Child_Id of each set is always 0 (zero).
sql - CASE WHEN with multiple condition optimalization ...
ウェブ4 日前 · Modified today. Viewed 4 times. -1. !This is what i am trying to optimalize ] ( https://i.sstatic.net/vTGMdvlo.png )so i am trying to update a table from another table in SQL SERVER. there are 3 types of flows and according to the flowtype i need to update the price column but i need to consider also if the country is US or no.
sql - cannot generate random uuid syntax error at or near ...
ウェブ3 日前 · I want to generate a random uuid but I got following error: ERROR: 42601: syntax error at or near "uuid_generate_v4". LINE 2: id UUID uuid_generate_v4() PRIMARY KEY, Here is my sql code: CREATE table cars (. id UUID uuid_generate_v4() PRIMARY KEY,
sql - Issue in inserting data in a table - Stack Overflow
ウェブ5 日前 · I have tried to database table in sql developer but it showing error. help me!! sql. oracle-sqldeveloper. asked 1 min ago. Wajid. 1. New contributor.
(kdb+/q) Table schema definitions - Stack Overflow
ウェブ4 日前 · How do you define a list of floats in a table schema? I understand that price:float$ () works for type f but what about for F. kdb. Follow. asked 1 min ago. bashprofile84. 8918.