原因之一:查看在输出的字符串拼接中是否使用了(+),ORACLE中的字符拼接是(||),当然大家还可以使用CONCAT(),但是要注意使用CONCAT()函数最多只能拼接两个参数的字符 Example-Code: declare v_empno number(10); v_ename varchar2(50); v_job varchar2(50); cursor c_emp is select empno, ename, job from...
TRIGGER_TYPE: A string that shows if this is a BEFORE or AFTER trigger and whether it is a row- or statement-level trigger (in a trigger that is fired before an INSERT statement, for example, the value of this column is BEFORE STATEMENT) TRIGGERING_EVENT: The type of SQL operation—suc...
END LOOP;INSERT INTO temp VALUES (NULL,salary,last_name);COMMIT;EXCEPTIONWHEN NO_DATA_FOUND THENINSERT INTO temp VALUES (NULL,NULL,'Not found');COMMIT;END;/*Please View The Example Code Reference*/
5Example 6类似语言 基本概念 是Oracle对标准数据库语言SQL的过程化扩充,它将数据库技术和过程化程序设计语言联系起来,是一种应用开发语言,可使用循环,分支处理数据,将SQL的数据操纵功能与过程化语言数据处理功能结合起来.PL/SQL的使用,使SQL成为一种高级程序设计语言,支持高级语言的块操作,条件判断,循环语句,嵌套等,...
Remember we encountered this at the very beginning of our acquaintance with the PL/SQL bug, way back in Example 3-1? Here in Figure 4-4, you see the code extracting the error detail at the time it occurs. This is a very powerful addition to the PL/SQL toolbox. Using this SQLCODE ...
For example, this PL/SQL code: Copy BEGIN DBMS_OUTPUT.PUT_LINE('This string ' || 'contains no line-break character.'); END; / Prints this: Copy This string contains no line-break character. For more information about the concatenation operator, see "Concatenation Operator". '0' thro...
例4-21は、Example 4-20を変更して、外側のブロックで宣言された変数をループ内の文で参照できるようにする方法を示しています。 例4-22では、ネストしたFORLOOP文の索引で同じ名前を使用しています。内部ループでは、外部ループのラベルで参照を修飾して、外部ループの索引を参照しています。ま...
This integrated learning solution teaches all the Oracle PL/SQL skills you need, hands-on, through real-world labs, extensive examples, exercises, and projects! Completely updated for Oracle 11g, Oracle PL/SQL by Example, Fourth Edition covers all the fundamentals, from PL/SQL syntax and ...
Cursor expressions (sometimes known as cursor subqueries) are an element of the SQL language and pre-Oracle9i were supported in SQL and by certain programming environments but not by PL/SQL. Oracle9i introduced PL/SQL support for cursor expressions. For example, a cursor expression can be used ...