primary-key

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How to find out what table's primary keys are using a select query

Is it possible to run SELECT PIRMARY_KEY FROM SomeTable, where PRIMARY_KEY is a keyword that开发者_开发百科 will automatically translate to SomeTable\'s primary key columns[详细]

2023-03-28 22:57 分类：问答
SQL Server Compact alter column size with constraint?

I am trying to modify the size of a column in a table, however that column is a primary key column and is used in other table ( which would need to have its size modified too)[详细]

2023-03-28 10:43 分类：问答
ALTER TABLE constraint problem

I\'m trying to run the following SQL statement: IF OBJECT_ID(\'MyTable\') IS NOT NULL DROP TABLE MyTable[详细]

2023-03-27 07:02 分类：问答
Create association on non-primary key fields with Entity Framework 4.1 Fluent API

We are using EF 4.1 and the fluent API to get data from a legacy database (that we are not permitted to change). We are having a problem creating a relationship between two tables where the related co[详细]

2023-03-26 23:05 分类：问答
Resetting the primary key to 1 after deleting all the data

So i have MySql and i have a table user with a user_id column and it is the primary key and auto incremented. Now when i delete all my d开发者_如何学运维ata from the table and add the new one, the use[详细]

2023-03-26 16:37 分类：问答
postgres getting data where two column references same parent id

There are 3 table in postgres database CREATE TABLE tab_name ( name_id 开发者_StackOverflow中文版integer NOT NULL,[详细]

2023-03-26 16:25 分类：问答
What to use as a Primary Key of SQL Database of dates

I am making a SQLite database with Java interface where the user can input information for different dates. Basically its like a diary. But I am having trouble constructing a table for the database.[详细]

2023-03-26 08:01 分类：问答
Greenplum COPY not filtering duplicate entries

I have a problem loading contents to the green plum table using COPY command. What i have is three column table lets say A , B , C and the table should not entertain duplicate elements. So i have made[详细]

2023-03-25 22:03 分类：问答
how do i determine what the next record number (PK) is?

im trying to get the next number in the autonumber sequence for the primary key programatically. For instance, if the last number in the table was 10, i need it to return 11. Before, I would use somet[详细]

2023-03-25 09:31 分类：问答
How do I change a primary key value in SubSonic 3.0?

Is it possible to update a primary key after it\'s been created in SubSonic 3.0?? Consider this MySql table:[详细]

2023-03-25 09:20 分类：问答