如何在 Oracle 中获取主键列?

我需要获取主键列的名称。

在输入中,我只有表名。

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SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner
FROM all_constraints cons, all_cons_columns cols
WHERE cols.table_name = 'TABLE_NAME'
AND cons.constraint_type = 'P'
AND cons.constraint_name = cols.constraint_name
AND cons.owner = cols.owner
ORDER BY cols.table_name, cols.position;

确保‘ TABLE _ NAME’是大写的,因为 Oracle 存储表名是大写的。

Select constraint_name,constraint_type from user_constraints where table_name** **= ‘TABLE_NAME’ ;

(这将列出主键,然后)

Select column_name,position from user_cons_columns where constraint_name=’PK_XYZ’;

(这将给出列,这里 PK _ XYZ 是主键名)

和“里奇”的答案一样,但是更简洁一些。

  1. 仅查询用户约束

    SELECT column_name FROM all_cons_columns WHERE constraint_name = (
    SELECT constraint_name FROM user_constraints
    WHERE UPPER(table_name) = UPPER('tableName') AND CONSTRAINT_TYPE = 'P'
    );
    
  2. Query for all constraints

    SELECT column_name FROM all_cons_columns WHERE constraint_name = (
    SELECT constraint_name FROM all_constraints
    WHERE UPPER(table_name) = UPPER('tableName') AND CONSTRAINT_TYPE = 'P'
    );
    

将下面的脚本保存为与 findPK.sql 类似的内容。

set verify off
accept TABLE_NAME char prompt 'Table name>'


SELECT cols.column_name
FROM all_constraints cons NATURAL JOIN all_cons_columns cols
WHERE cons.constraint_type = 'P' AND table_name = UPPER('&TABLE_NAME');

然后可以使用

@findPK

试试这个代码 在这里,我创建了一个用于在 Oracle 中获取主键列的表,它被称为 test 和 then query

create table test
(
id int,
name varchar2(20),
city varchar2(20),
phone int,
constraint pk_id_name_city primary key (id,name,city)
);


SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner FROM all_constraints cons, all_cons_columns cols WHERE cols.table_name = 'TEST' AND cons.constraint_type = 'P' AND cons.constraint_name = cols.constraint_name AND cons.owner = cols.owner  ORDER BY cols.table_name, cols.position;