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Tag: schema
Implement database schema for organizing historical stock data
I am new to MySQL, I try to use MySQL to store my stock data. I followed the answer by boe100 in reference: Database schema for organizing historical stock data I create my table as follows: mysql> describe StockDailyQuotations; Field Type Null Key Default Extra ts_code varchar(9) NO PRI NULL trade_date in…
Chat schema with one side deletion
I’m struggling with a chat schema that permits deletion from one side of the conversation in a relational database (PostgreSQL). Here is my best approach: my schema All schemas I found were about …
How to make it into BCNF
Good morning, I wonder how I can make sure this schema is in BCNF. petition(ID, title, contents, budget, organizationID, official, resultID, applicantID) applicant(ID, name) official(ID, name, department) organization(ID, name, phoneNumber) *Each petition has an official. *Each petition should have more than …
What’s the meaning of CWD in database design?
What’s the meaning of CWD? Usually, It used in SQL Schema. like cwd_user or cwd_directory. I have seen it here Jira database schema.
How to copy data from one table to another when foreign key is only defined in the destination table?
Table_A schema: Table_B schema: Column UserId is defined as Foreign Key in Table_A. I need to copy data from Table_B to Table_A and I used: But I get: The INSERT statement conflicted with the FOREIGN KEY constraint “FK_UserId” The conflict occurred in database “Table_A”, table “d…