625 questions
import pymysqlimport MySQLdb'''db = MySQLdb.connect(host=13.209.68.158, # your host, usually localhost user=Woo, # your username passwd=cbnuroot123, # your password db=CBNU) # name of the d...
Hibernate 5.0.9 version Dialect is using postgresql. To use the new java.time package in Java8, add jackson-datatatatype-jsr310 dependency and use it.When the field is declared and DDL is automaticall...
Here's what I want to do.Example A)select col_name from table_a where col_name like '%val%';Result A)val1val2val3Example B)select col, count(col) from table_bwhere color '%result A value 1%' OR color ...
If there are 10 pieces of data, we will take out data from 1st to 10th, compare it with data from other tables, and then process INSERT or UPDATE. I wonder if there is a grammar that can be compared b...
ended_94 = db.session.query(Ended_event).filter(Ended_event.league_id == 94).order_by(Ended_event.time.desc()).limit(4)ended_99 = db.session.query(Ended_event).filter(Ended_event.league_id == 99).orde...
I am currently using postgresql 9.4 with postgis 2.1. I'm trying to make an application with a long storage.
I have a question because it is my first time to see the sql door.I knew that the case statement was used to set the conditional expression CASE Column Name | Expression WHEN Conditional Expression 1 ...
Hello, I'm a student implementing a bulletin board search.When writing implements pagenation on the current bulletin board at more than 1 million rows, The number of pages is calculated by using a sep...
Table 1, Table 2, Table 3 are made like this, and when you calculate table 1 and 2 data and insert it into table 3, it is too difficult to make it into sql statements. 프로그래 I'm going to make the n...
A query is a self-joined sentence with one table as follows:SELECT cat.cat_id, cat.cat_name, sub_cat.cat_id, sub_cat.cat_nameFROM Categories AS catLEFT JOIN Categories AS sub_catON sub_cat.parent = ca...
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