PowerDesigner导出SQL,导入到Oracle中查询表结构报“ORA-04043:
环境 Oracle 11.2.0 SQL Plus PowerDesigner 15.1 问题 这学期学习Oracle数据库应用技术,需要做一个课程设计。PowerDesigner导出SQL,导入到Oracle中查询表结构报“ORA-04043: 对象XXX不存在”错误。 解决 查询表结构时加上双引号。 总结 工具自动生成的SQL
环境
Oracle 11.2.0 + SQL Plus + PowerDesigner 15.1
问题
这学期学习Oracle数据库应用技术,需要做一个课程设计。PowerDesigner导出SQL,导入到Oracle中查询表结构报“ORA-04043: 对象XXX不存在”错误。
解决
查询表结构时加上双引号。
总结
工具自动生成的SQL会有些问题,所以我是不建议使用工具自动生成的,手写才是保证万无一失的最好方法。
操作日志
G:\编程资料\Learning\数据库应用技术 Oracle\实验\实验五>sqlplus wgb SQL*Plus: Release 11.2.0.1.0 Production on 星期二 6月 11 09:07:05 2013 Copyright (c) 1982, 2010, Oracle. All rights reserved. 输入口令: 连接到: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production With the Partitioning, OLAP, Data Mining and Real Application Testing options SQL> SELECT * from tab; TNAME TABTYPE CLUSTERID ------------------------------ ------- ---------- tb_class TABLE tb_course TABLE tb_score TABLE tb_select TABLE TNAME TABTYPE CLUSTERID ------------------------------ ------- ---------- tb_student TABLE tb_teacher TABLE tb_user TABLE 已选择7行。 SQL> DESC tb_class; ERROR: ORA-04043: 对象 tb_class 不存在 SQL> DESC tb_course; ERROR: ORA-04043: 对象 tb_course 不存在 SQL> DESCRIBE tb_class; ERROR: ORA-04043: 对象 tb_class 不存在 SQL> SELECT * from tb_class 2 ; SELECT * from tb_class * 第 1 行出现错误: ORA-00942: 表或视图不存在 SQL> DESC "tb_class"; 名称 是否为空? 类型 ----------------------------------------- -------- ---------------------------- n_teacher_id1 NUMBER(8) n_student_id NUMBER(8) n_class_id NOT NULL NUMBER(8) vc_class_name NOT NULL VARCHAR2(40) vc_class_col NOT NULL VARCHAR2(30) n_course_teacher_id NOT NULL NUMBER(8)
参考资料
http://blog.csdn.net/bupt_zoucq/article/details/6712198
<span><span>我的邮箱</span></span><span>:</span>wgbno27@163.com <span> <span>新浪微博</span></span><span>:</span>@Wentasy27 <span>微信公众平台</span>:JustOracle(微信号:justoracle) <span>数据库技术交流群</span>:336882565(加群时验证 From CSDN XXX) <span>Oracle交流讨论组</span>:https://groups.google.com/d/forum/justoracle <span><strong>By Larry Wen</strong></span>Copy after login
![]() |
![]() ![]() |
@Wentasy |

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

The retention period of Oracle database logs depends on the log type and configuration, including: Redo logs: determined by the maximum size configured with the "LOG_ARCHIVE_DEST" parameter. Archived redo logs: Determined by the maximum size configured by the "DB_RECOVERY_FILE_DEST_SIZE" parameter. Online redo logs: not archived, lost when the database is restarted, and the retention period is consistent with the instance running time. Audit log: Configured by the "AUDIT_TRAIL" parameter, retained for 30 days by default.

The function in Oracle to calculate the number of days between two dates is DATEDIFF(). The specific usage is as follows: Specify the time interval unit: interval (such as day, month, year) Specify two date values: date1 and date2DATEDIFF(interval, date1, date2) Return the difference in days

The Oracle database startup sequence is: 1. Check the preconditions; 2. Start the listener; 3. Start the database instance; 4. Wait for the database to open; 5. Connect to the database; 6. Verify the database status; 7. Enable the service (if necessary ); 8. Test the connection.

The INTERVAL data type in Oracle is used to represent time intervals. The syntax is INTERVAL <precision> <unit>. You can use addition, subtraction, multiplication and division operations to operate INTERVAL, which is suitable for scenarios such as storing time data and calculating date differences.

The amount of memory required by Oracle depends on database size, activity level, and required performance level: for storing data buffers, index buffers, executing SQL statements, and managing the data dictionary cache. The exact amount is affected by database size, activity level, and required performance level. Best practices include setting the appropriate SGA size, sizing SGA components, using AMM, and monitoring memory usage.

To find the number of occurrences of a character in Oracle, perform the following steps: Get the total length of a string; Get the length of the substring in which a character occurs; Count the number of occurrences of a character by subtracting the substring length from the total length.

Oracle database server hardware configuration requirements: Processor: multi-core, with a main frequency of at least 2.5 GHz. For large databases, 32 cores or more are recommended. Memory: At least 8GB for small databases, 16-64GB for medium sizes, up to 512GB or more for large databases or heavy workloads. Storage: SSD or NVMe disks, RAID arrays for redundancy and performance. Network: High-speed network (10GbE or higher), dedicated network card, low-latency network. Others: Stable power supply, redundant components, compatible operating system and software, heat dissipation and cooling system.

Oracle uses the "||" symbol to concatenate strings. The usage method is as follows: connect the strings to be connected with the "||" symbol; the priority of string connection is low, and parentheses need to be used to ensure the priority; an empty string will still be an empty string after connection; NULL value connection is still NULL.
