primary-key

相关标签：javascript jquery android 多少钱 iPhone

Is it insecure to reveal a row's primary key to the user?

Why do many applications replace the primary key of a database with a seemingly random alternative id when revealing the record to the user?[详细]

2023-03-25 03:55 分类：问答
Can I avoid redundant primary key columns in a MySQL table for django (python)?

I am aware of the fact, the if I use the ORM of Django every table has to have a primary key column. Somehow if you have a many_to_many table which links to tables (let\'s call them authors and books)[详细]

2023-03-24 18:50 分类：问答
postgresql: error duplicate key value violates unique constraint

This question have been asked by several people but my problem seems to be different. Actually I have 开发者_开发问答to merge same structured tables from different databases in postgresql into a new D[详细]

2023-03-24 00:35 分类：问答
Adding Item with Many-to-Many Relationship In Entity Framework

I am getting a primary key violation error when I attempt to add an item with a many-to-many relationship:[详细]

2023-03-22 17:10 分类：问答
Primary key value after insertion of row in SQL Server 2005

In SQL Server 2005 I am inserting a row into a table usinga stored procedure and I want to fetch the new primary开发者_高级运维 key value justafter inserting that row. I am using following approach to[详细]

2023-03-22 04:58 分类：问答
What primary key to use in my SQLite database?

I have a .csv file that I turned into an SQLite database with the first column as a date and time (as a TEXT datatype because it\'s in the format 7/20/201112:00:00 PM), the second column as the subsec[详细]

2023-03-22 04:54 分类：问答
Two primary keys specified in MySQL database

I am trying to create a test database that is a replica of a preexisting database. I am using Django models (theoretically the models used with the original database) in order to do this. I recently i[详细]

2023-03-22 00:47 分类：问答
How to best explain on what fields should a user join on?

I need to explain to somebody how they can determi开发者_开发百科ne what fields from multiple tables/views they should join on.Any suggestions?I know how to do it but am having difficulty trying to ex[详细]

2023-03-18 17:26 分类：问答
Which is faster to find repetitions?

I have a table with 1 column and I want to check repetition of a value between 10,000 available rows.[详细]

2023-03-17 22:07 分类：问答
Primary and foreign keys

Simple question, can\'t seem t开发者_如何学编程o find an answer on Google. I\'m normalizing a database and I\'m converting one of the tables to 2nd Normal Form. Question is: can the primary key of a t[详细]

2023-03-17 04:41 分类：问答