I have the following two tables: CREATE TABLE `ip_info` ( `start_ip` int(10) unsigned NOT NULL, `end_ip` int(10) unsigned NOT NULL, `country_code` varchar(3) DEFAULT NULL, `country_name` varchar(255) DEFAULT NULL, `continent_code` varchar(3) DEFAULT NULL, `continent_name` varchar(255) DEFAULT NULL, `asn` int(10) unsigned DEFAULT…
There's a table with compound index (col1, col2, col3). There's a lot of data in this table. Want to build query for example WHERE col1 = 2 AND col2 = 12 AND col3 IN (1, 2, 3, ..., 40) Is…
what does means ref=const,const in mysql explain statment? i add index for the table and the index contains tow columns where statment contains two index columns and some not in index columns why does the explain statment extra column show…
My website is built using Django and MySQL. The content table in the MySQL database contains nearly 20 fields, including id, title, description, content, analyze, and so on. Some of these fields are of varchar type, some are of text…
I have two tables. One with a parent child hierarchy and one with the details of some leaves somewhere in the paths. create table category ( category_id integer, category_name text, parent_category integer, level integer); insert into category values (1, 'cat1',…
I want to be able to search for people "similar" to what I have in the database (e.g. a person with a typo in their name or date of birth). I want to use the levenshtein function for that in…
I was hoping for some advice in terms of the creating of a partial index on a boolean value IsDeleted: false. Our existing .net service, using the MongoDb.Driver makes the call _dbContext?.Documents?.FindAsync(model => model.Id == id && !model.IsDeleted) the equivalent…
Ex. SELECT * FROM A JOIN B ON A.idx = B.idx JOIN C ON A.idx = C.idx WHERE A.create_dt BETWEEN '2023-05-01' AND '2023-05-31' OR A.last_dt BETWEEN '2023-05-01' AND '2023-05-31' OR B.create_dt BETWEEN '2023-05-01' AND '2023-05-31' OR B.last_dt BETWEEN '2023-05-01' AND…
I have a Postgres table named "base" with a jsonb field called "addresses" which stores multiple addresses for the same user. Here is the table structure: create table base(name text, addresses jsonb); insert into base(name, addresses) values('John', '[{"zip":"01431000","state":"SP","number":100,"street1":"Avenida Brasil","city_name":"São Paulo"},{"zip":"01310900","state":"SP","number":200,"street1":"Avenida…
I have a table where I want to add auto Incrementing Id which isn't there. The rows aren't sorted. I want to add ID column based on the lexicographical order of another column, As shown below: CURRENT TABLE AFTER ADDING…