Explicit Cursors are those cursors that are defined by programmers to have more control over the Context Area (where the results of SQL queries are stored). These cursors need to be first defined in the declaration block of the PL/SQL program. It is created for the SQL statements that ...
后来看了David Litchfield的文章"Oracle 11g DBMS_SQL Security Changes",知道DBMS_SQL在11g中的安全性得到了加强。而且如果出现了ORA-29471的错误之后,只有断开当前这个session, 然后重新连接数据库才能正常调用DBMS_SQL包。如果想关闭security check,需要将一个隐含参数_dbms_sql_security_level设置成0 (默认值为1),...
With AWS DMS, you can migrate data from Oracle and PostgreSQL databases that use cursors. Cursors are database objects that enable traversal over rows from a result set in a database. They facilitate processing individual rows or row segments from a SQL
11g Updates Oracle 11g allows the two-way conversion between ref cursors toDBMS_SQLcursors, as describedhere. 12c Updates Oracle 12c allows implicit statements results, similar to that seen in Transact-SQL, as describedhere. For more information see: ...
dbms_output.put_line('update '|| sql%rowcount ||' records'); end; / b.举例: declare begin for my_dept_rec in ( select department_name, department_id from departments) loop dbms_output.put_line(my_dept_rec.department_id || ' : ' || my_dept_rec.department_name); ...
Next, we can enhance the access control of the SP as described inmy previous article. To test the output of this SP, we will write a short PHP script: <?php $dbms = 'mysql'; $host = 'localhost'; $db = 'sitepoint'; $user = 'root'; ...
Can we do this with a single SQL statement? I am not an SQL expert and I haven’t been able to figure out how to achieve the desired result (“6 consecutive losses”) from one SQL statement. The input of gurus will be highly appreciated – leave it in the comments below. ...
Next, we can enhance the access control of the SP as described in my previous article. To test the output of this SP, we will write a short PHP script: <?php $dbms = 'mysql'; $host = 'localhost'; $db = 'sitepoint'; $user = 'root'; $pass = 'your_pass_here'; $dsn = "...
PL/SQL Cursors - Learn about PL/SQL cursors, their types, and how to use them effectively in your database programming. Enhance your skills with practical examples.
using cursors. Before deciding to go with the cursor, be sure you’ve investigated enough to conclude that the cursor is the only possible (good) solution. Same stands for loops in databases. In the previous article,Intro to SQL Server loops, we’ve used loops, but not to loop through ...