时间过去的稍微有些久远,无法记得当时是如何操作的了。这里只对重点内容进行记述。 命令行删除Workspace 官方参考文档 实验的时候创建很多Workspace,所以想要一次性全部删除,具体的删除操作可以参考文档: http://docs.oracle.com/cd/E17556_01/doc/admin
时间过去的稍微有些久远,无法记得当时是如何操作的了。这里只对重点内容进行记述。
命令行删除Workspace
官方参考文档
实验的时候创建很多Workspace,所以想要一次性全部删除,具体的删除操作可以参考文档:
http://docs.oracle.com/cd/E17556_01/doc/admin.40/e15521/adm_mg_wrkspc.htm#CHDHBEFI
删除的具体操作步骤与说明
To delete a workspace in a runtime development environment: Start SQL*Plus and connect to the database where Oracle Application Express is installed as SYS. For example: On Windows: <strong>SYSTEM_DRIVE:\ sqlplus /nolog connect sys as sysdba</strong> On UNIX and Linux: <strong>$ sqlplus /nolog connect sys as sysdba</strong> When prompted enter the appropriate password. Run the following statement: <strong>ALTER SESSION SET CURRENT_SCHEMA = APEX_040000 </strong>Run the following statement: <strong>BEGIN APEX_INSTANCE_ADMIN.REMOVE_WORKSPACE(WORKSPACE_NAME, DROP_USER, DROP_TABLESPACE) END;</strong> Where: WORKSPACE_NAME is the name of the workspace. DROP_USER is either Y or N. The default is N. DROP_TABLESPACE is either Y or N. The default is N.在决定CURRENT_SCHEMA的时候,可以先查看本地安装的数据库内容和具体的APEX版本。
查看APEX版本
SQL> select version_no from apex_release; VERSION_NO -------------------------------------------------------------------------------- 4.0.2.00.09
查看数据库中的schema情况
SQL> select username from all_users; USERNAME ------------------------------------------------------------ XS$NULL APEX_040000 APEX_PUBLIC_USER FLOWS_FILES MDSYS ANONYMOUS XDB CTXSYS OUTLN SYSTEM SYS 已选择11行。
GUI删除Workspace
访问GUI管理界面
通过http://127.0.0.1:8080/apex/apex_admin可以进入APEX后台管理GUI。用户名为Admin,初始密码记不清了,按照官方文档的指导,可以轻松重置密码。
重置GUI管理密码
通过官方指南http://docs.oracle.com/cd/E23903_01/doc/doc.41/e21673/otn_install.htm#BABDEAFD,可以很容易地重置密码。首先需要进入脚本所在目录。
C:\oraclexe\app\oracle\product\11.2.0\server\apex>dir 驱动器 C 中的卷没有标签。 卷的序列号是 3CCF-056C C:\oraclexe\app\oracle\product\11.2.0\server\apex 的目录 2014-01-14 22:05 <DIR> . 2014-01-14 22:05 <DIR> .. 2011-08-27 10:00 1,687 <strong>apxchpwd.sql</strong> 2011-08-27 10:00 3,005 apxconf.sql 2011-08-27 10:00 4,537 apxremov.sql 2011-08-27 10:00 1,625 apxxepwd.sql 2011-08-27 10:00 10,626 gen_inst.sql 5 个文件 21,480 字节 2 个目录 19,138,473,984 可用字节然后运行上面粗体文件即可,命令如下:
SYSTEM_DRIVE:\ sqlplus /nolog SQL> CONNECT SYS as SYSDBA Enter password: SYS_password @apxchpwd
创建Workspace
GUI创建Workspace
GUI创建Workspace有两种途径,一种是面向开发人员的http://hostname:port/apex,还有一种就是面向APEX管理员的http://127.0.0.1:8080/apex/apex_admin。
异常处理
如果在创建的过程中出现了下面的错误,那可能是之前删除Workspace时没有清除所有相关数据,所以我们需要继续手工删除这些数据。
ORA-00001: unique constraint (APEX_040000.WWV_FLOW_PROV_COMPANY_NAME) violated
用下面命令删除相关数据后,就可以解决上面的约束冲突问题(冲突是由表中的一个索引引起的)。
SQL> DELETE FROM apex_040000.WWV_FLOW_PROVISION_COMPANY;

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.


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