DECLARE v_count binary_integer := 1 /* LOOP循环 */ BEGIN LOOP insert into tmp_table(num_col) value (v_count); v_count := v_count + 1; EXIT WHEN v_count > 50; END LOOP; END; /* FOR循环 */ BEGIN FOR v_count in 1..50 LOOP insert into tmp_table(num_col) value (v_count...
Between value1 and value2 ;value1的值比value2值小,表示值在value1和value2之间 is null:表示这个值是空时条件成立 --select * from emp where comm is null; is not null:表示值不为空时条件成立 --查询员工的年薪 Select ‘年薪’, sal*12 from emp; 4.排序分组 (1)排序 select 列名,列名,..,...
variable_name [CONSTANT] datatype [NOT NULL] [:= | DEFAULT initial_value] 其中,variable_name是PL/SQL中的有效标识符,datatype必须是有效的PL/SQL数据类型或任何用户定义的数据类型。一些有效的变量声明及其定义如下所示: sales number(10, 2); pi CONSTANT double precision := 3.1415; name varchar2(25...
typelast_name_lististableofvarchar2(22) indexbybinary_integer; last_namelast_name_list; 令当定义一个长类型时,就涉及到一个删除表的问题,PL/SQL表不能用 Delete语句来删除,但可以将每一行空值如下所示: sal_tab(3):=null; 另一种法是定义两个相同类型的表类型,假如要将另一表清空,只需将 ...
in between value1 and value2 like % _ in null not no in,is not null 谓词in和not in 有哪些职员和分析员 select ename,job from emp where job in ('clerk','analyst'); select ename,job from emp where job not in ('clerk','analyst'); ...
SQL>declare2l_value1varchar2(100);3l_value2varchar2(100):='';4l_value3varchar2(100):=null;5l_value4varchar2(100)defaultnull;6begin7null;8end;9/PL/SQL 过程已成功完成。 我们不仅可以将变量定义为NULL,而且就如我们早先看到的,我们还可以在PL/SQL程序块的可执行部分使用保留字NULL作为桩基模块(st...
I've been testing out Angular Elements. Basically I created 2 angular elements: a simple button and a simple input. You can check them out here: http://kaloyanmanev.com/edo-button.js and http://kaloya... Obtaining phone type in string, when type is custom ...
type c_stu is ref cursor; --定义函数 function numAdd(num1 number,num2 number)return number; --定义过程 procedure GetStuList(cid in varchar2,c_st out c_stu); end; --2、实现包体,名称一致。 create or replace package body p_stu
BEGIN …… END Create_Pick_List; PROCEDURE Init IS BEGIN NULL; END Init; FOR n_ IN 1..count_ LOOP IF (name_arr_(n_) = SCHEDULED_AT_TIME) THEN at_time_ := value_arr_(n_); ELSIF (name_arr_(n_) = WEDNESDAY) THEN on_days_ := on_days_ || wed;; ELSE Message_SYS.Add_...
The PL/SQL tables used as parameters in the mod_plsql environment must have a base type ofVARCHAR2. Oracle can convertVARCHAR2to other data types such asNUMBER,DATE, orLONG. The maximum length of aVARCHAR2variable is 32K. If you cannot guarantee that at least one value will be submitted...