FOR loop_counter IN [REVERSE] lowest_number..highest_number LOOP {.statements.} END LOOP; You would use a FOR Loop when you want to execute the loop body a fixed number of times. 译:当你需循环体执行一定的次数的时候,就可以使用FOR Loop。 Let's take a look at an example. FOR Lcntr ...
FOR employee_rec in c1 LOOP total_val := total_val + employee_rec.monthly_income; END LOOP; RETURN total_val; END; In this example, we've created a cursor called c1. TheCURSOR FOR Loopwill terminate after all records have been fetched from the cursor c1. 译:在这个示例中,我们建立了...
先创建表: CREATE TABLE TB_USER ( ID INTEGER PRIMARY KEY, USER_NAME VARCHAR2(20) NOT NULL, USER_AGE INTEGER NOT NULL ); CREATE SEQUENCE SEQ_USER INCREMENT BY 1 START WITH 1 NOMAXVALUE NOCYCLE CACHE 10; CREATE OR REPLACE TRIGGER TR_USER BEFORE INSERT ON TB_USER FOR EACH ROW BEGIN SEL...
Consider the following example: DECLARE l_counter PLS_INTEGER := 10; BEGIN FOR l_counter IN 1.. 5 loop DBMS_OUTPUT.PUT_LINE (l_counter); end loop; -- after the loop DBMS_OUTPUT.PUT_LINE (l_counter); END; Code language: SQL (Structured Query Language) (sql) Here is the result: ...
Oracle PL/SQL中的for循环语法如下: FOR loop_counter IN [REVERSE] lower_bound..upper_bound LOOP -- Loop statements END LOOP; 复制代码 其中,loop_counter是循环计数器变量,lower_bound是循环的起始值,upper_bound是循环的结束值。循环会从lower_bound开始逐步增加或减少至upper_bound,直到达到结束条件为止。
1) PL/SQL cursor FOR LOOP example# The following example declares an explicit cursor and uses it in the cursorFOR LOOPstatement. DECLARECURSORc_productISSELECTproduct_name, list_priceFROMproductsORDERBYlist_priceDESC;BEGINFORr_productINc_productLOOPdbms_output.put_line( r_product.product_name ||...
END LOOP; CLOSE c_employees; END; 而使用FOR语句循环游标,代码则变得简洁明了: BEGIN FOR r_employee IN (SELECT name, salary FROM employees) LOOP DBMS_OUTPUT.PUT_LINE('Name: ' || r_employee.name || ', Salary: ' || r_employee.salary); ...
问使用for循环插入/更新的Oracle PL/SQL过程EN我需要使用cursor for循环编写PL/SQL过程，以便按行插入/...
[oracle]pl/sql --循环语句demo --循环语句 有三种结构 loop while for --使用的表users Name Type Nullable Default Comments --- --- --- --- --- ID NUMBER(4) Y NAME VARCHAR2(29) Y 1. 2. 3. 4. --loop循环 要以end loop结束...
这段PLSQL代码循环遍历您的STAGE_PROJECT行,如果在PROJECT_DATA中找到行,它将更新这些行,否则,它将插入未找到的行。 DECLARE CURSOR SPCUR IS SELECT * FROM STAGE_PROJECT; EX PLS_INTEGER; BEGIN FOR STAGE_PROJECT_REC IN SPCUR LOOP SELECT COUNT(*) INTO EX FROM PROJECT_DATA WHERE PROJECT_ID = STAGE...