PL/SQL Block in a C Program /* available online in file 'sample5' */#include <stdio.h>char buf[20];EXEC SQL BEGIN DECLARE SECTION;int acct;double debit;double new_bal;VARCHAR status[65];VARCHAR uid[20];VARCHAR pwd[20];EXEC SQL END DECLARE SECTION;EXEC SQL INCLUDE SQLCA;main(){exte...
Any program that spends a lot of time doing PL/SQL processing, as opposed to issuing DDL statements likeCREATE TABLEthat are just passed directly to SQL. You will want to investigate native compilation. Because many built-in database features use PL/SQL, you can apply this tuning feature to...
/SQL是ORACLE系统的核心语言,现在ORACLE的许多部件都是由PL/SQL写成。在PL/SQL中可以使用的SQL语句有: INSERT,UPDATE,DELETE,SELECT INTO,COMMIT,ROLLBACK,SAVEPOINT。提示:在 PL/SQL中只能用 SQL语句中的 DML 部分,不能用 DDL 部分,如果要在PL/SQL中使用DDL(如CREATE table 等)的话,只能以动态的方式来使用。
-- 更新指定员工工资,增加100; DECLARE v_empno employees.employee_id%TYPE :=&empno; no_result EXCEPTION; BEGIN UPDATE employees SET salary = salary+100 WHERE employee_id = v_empno; IF SQL%NOTFOUND THEN RAISE no_result; END IF; EXCEPTION WHEN no_result THEN DBMS_OUTPUT.PUT_LINE('你的数据...
1.1 基本结构 PL/SQL程序由三个块组成,即声明部分、执行部分、异常处理部分。 1.2 命名规则 1.3 记录类型 范例如下: 1.4 数组类型 范例 1.5 %TYP...
总之我尝试过很多配置,微端的SQL我始终连接不上数据库(原谅我太菜),环境变量只能沿用原来的配置,全部设置为oracle端的,仅有一个环境变量为微端,即: C:\Ora10InstantClient 然后是数据库的配置,一般来说,oracle的配置目录如下: 配置目录 sample目录下有tnsnames和listener的原生文件,默认admin下无这两个文件,需要使用...
DBFS Sample Store plsql-hierarchical-profiler.zip This archive contains code to create several PL/SQL programs and to use the PL/SQL hierarchical performance profiler to record the execution of each. It also contains the profiler output for each run, prepared as a set of mutually cross-referenci...
How a Sample PL/SQL Block Looks DECLARE Variable declaration BEGIN Program Execution EXCEPTION Exception handling END; SQL Command Categories SQL commands are grouped into four major categories depending on their functionality. They are as follows: ...
1. 在PL/SQL 块的定义部分定义异常情况: <异常情况> EXCEPTION; 2. 将其定义好的异常情况,与标准的ORACLE错误联系起来,使用EXCEPTION_INIT语句: PRAGMA EXCEPTION_INIT(<异常情况>, <错误代码>); 3. 在PL/SQL 块的异常情况处理部分对异常情况做出相应的处理。
WHERE A.SAMPLE_TIME BETWEEN SYSDATE - 30 / 2880 AND SYSDATE GROUP BY S.SID, S.USERNAME ORDER BY TOTAL_WAIT_TIME DESC; 1. 2. 3. 4. 5. SELECT A.PROGRAM, A.SESSION_ID, A.USER_ID, D.USERNAME, S.SQL_TEXT, SUM(A.WAIT_TIME + A.TIME_WAITED) TOTAL_WAIT_TIME ...