Example-1 PL/SQL Code: DECLAREv_duplicate_value NUMBER :=125;BEGINBEGININSERTINTOemployees(employee_id)VALUES(v_duplicate_value);DBMS_OUTPUT.PUT_LINE('Insertion successful.');EXCEPTIONWHENDUP_VAL_ON_INDEXTHEN-- Handle the exceptionDBMS_OUTPUT.PUT_LINE('Error: Duplicate value already exists.');-...
phone_number varchar(15) hire_date date job_id varchar(25) salary integer commission_pct decimal(5,2) manager_id integer department_id integer PL/SQL Code: CREATEORREPLACEPACKAGE employee_count_pkgASFUNCTIONget_employee_count(p_job_title VARCHAR2)RETURNNUMBER;ENDemployee_count_pkg;/CREATEORREPLAC...
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,...
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 ...
ORA-06502:PL/SQL:数字或值错误:字符到数值的转换错误 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); ...
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 ...
--没有使用native compilation时,PL/SQL 单元里的PL/SQL语句会被编译成中间码,系统码(机器可读的形式),其存储在catalog里并在运行时被解释。 With PL/SQLnative compilation, the PL/SQL statements in a PL/SQL unit are compiled intonative code and stored in the catalog. The native code need not be...
Click the SQL Commands icon to display the SQL Commands page. On the SQL Commands page, enter the PL/SQL code in Example 4-1. Note that some of the lines of code are terminated with a semi colon (;) and the entire code unit is terminated with a slash (/). The slash is required...
--下面使用匿名的PL/SQL块来过程来调用包 DECLARE v_emp_table cust_type.emp_tb_type; BEGIN cust_type.read_emp_table(v_emp_table); DBMS_OUTPUT.PUT_LINE('An example: '||v_emp_table(3).ename); END; An example: WARD 九、更多参考 ...
PL/SQL is tightly integrated with SQL, themost widely used database manipulation language. For example: (1)PL/SQL letsyou use all SQL data manipulation, cursor control, and transaction controlstatements, and all SQL functions, operators, and pseudocolumns. ...