本教程详细介绍了如何在Oracle数据库中查找和确定表的主键信息。包括使用数据字典视图及SQL查询命令的方法，帮助用户轻松掌握相关操作技巧。
查询Oracle数据库表的主键可以使用以下SQL脚本：
```sql
SELECT
c.table_name,
c.column_name,
r.constraint_name,
r.owner AS table_owner,
r.search_condition,
r.status,
CASE WHEN cc.position = 1 THEN YES ELSE NO END AS is_primary_key
FROM
dba_constraints r
JOIN
dba_cons_columns c ON (r.owner = c.owner AND r.constraint_name = c.constraint_name)
LEFT JOIN
dba_constraints rc ON (c.table_name = rc.table_name AND c.column_name = rc.search_column AND rc.constraint_type IN (P, U))
JOIN
dba_col_comments cc ON (cc.table_name = c.table_name AND cc.column_name = c.column_name)
WHERE
r.owner NOT IN (SYS,SYSTEM)
AND
r.constraint_type IN (P) -- P代表主键约束，U表示唯一性约束
ORDER BY
table_owner, table_name;
```
此脚本可以帮助用户查询Oracle数据库中所有表的主键信息。
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