I'm creating a constraint in a table so that none of 8 columns must be equal to each other. I wanted to do it like this: alter table mytable add constraint no_duplicate_values check (col_1 <> col_2 <> col__3 <> col__4…
I'm trying to create tables to store very large volume of data, and I wonder if I can use null TIMESTAMP to save storage? I have a variable update_at, which will be updated to NOW() whenever I modify the associated…
I'm using MySQL database. I have to join two tables (A, B). They have relationship (N->N). Actually, A is chatting room table and B is chat (chat record). Chatting room has many chats. If a user enters chat app, the…
I am trying to create editable table, I am using ajax request for the same by following a tutorial over youtube, but the ajax request to save the changes after editing the table seems to fail, please suggest me the…
I am currently busy learning Javascript for web development but i'm also trying to decide which language to learn after Javascript. My question is, is it possible to change a text without opening your code studio, like changing a products…
I currently have an api project that is kind of a middleware API. It get's requests and redirects it to other APIs and caches some things in redis for faster access. Therefore I don't really need a database and didn't…
I have an Elasticsearch index, part of its mapping is as follows: ... }, "entity": { "properties": { "DateTime": { "type": "date" }, "Event": { "type": "keyword" }, "Location": { "type": "keyword" }, "Organ": { "type": "keyword" }, "Person": {…
To show application_status in result, I'm using DB::raw statement in my query. DB::raw(' CASE WHEN status = 0 THEN "Pending" WHEN status = 1 THEN "Approved" WHEN status = 2 THEN "Declined" END AS application_status' ) How can I convert…
while studying about the As statment i get to knwon it is executed at the end of the uqery so if in case i am trying to use the alisd name i have created in a query like select film…
In my Postgres database I naively created a column in table Foos as a json[] that looks like this: TABLE Foos id | ... | baas -------------------------------- 1 | ... | [ | ... | { | ... | "name":…