SQL> declare 2 TYPE row_num_type IS TABLE OF NUMBER INDEX BY PLS_INTEGER; TYPE row_text_type IS TABLE OF VARCHAR2(11) INDEX BY PLS_INTEGER; row_num_tab row_num_type; row_text_tab row_text_type;beginFOR i IN 1 .. 10 LOOP row_num_tab(i) := i; row_text_tab(i) := 'row...
T-sql For in loop 变量循环语句 For 变量 in 循环开始的值 .. 循环结束的值(小于该值) Loop --做处理的语句 End Loop 例子: ---循环找出供应商 for i in 0 .. vendor_Total loop-- i 和 vendor_Total 在存储过程头部定义,vendor_Total 在循环之前已经赋值 if i = vendor_Total then str_vendor ...
import mysql.connector # 连接到数据库 db = mysql.connector.connect( host="localhost", user="yourusername", password="yourpassword", database="yourdatabase" ) cursor = db.cursor() # 假设我们要获取id在1到10之间的所有用户 for i in range(1, 11): query = "SELECT * FROM users WHERE id...
--commit; end loop; end;
loop exception 原创 zhuwensheng 2015-11-03 23:26:14 1393阅读 Cursor forloopinOracle declare l_sql varchar2(123); -- variable that contains a query l_c sys_refcursor; -- cursor variable(weak cursor). l_res your_table%rowtype; -- variable containing fetching d... ...
在pgsql中,可以使用WITH RECURSIVE语句来实现递归查询。递归查询适用于需要查找具有层次结构关系的数据,比如树形结构或图形结构。 示例代码: WITH RECURSIVE recursive_query AS ( SELECT * FROM table_name WHERE parent_id IS NULL UNION ALL SELECT t.* FROM table_name t JOIN recursive_query r ON t.parent...
FOR I IN 0..0 LOOP 至END LOOP。; 是循环包裹语句，从0开始到0结束（表示循环只执行一次），第二句的意思是从文件流fp里读取一行,赋值给变量v_STR.然后在第三行变量v_LINE自增1。这是Oracle中的循环代码块，是非常基础的。for循环，in *...* 从什么到什么。比如你的从0到0,0是满足条件...
A) Simple PL/SQL FOR LOOP example In this example, the loopindexisl_counter,lower_boundis one, andupper_boundis five. The loop shows a list of integers from 1 to 5. BEGINFORl_counterIN1..5LOOPDBMS_OUTPUT.PUT_LINE( l_counter );ENDLOOP;END;Code language:SQL (Structured Query Language...
(in_job varchardefault'AC_MGR')ISSELECTempname,salaryFROMemp where job=in_job;v_job emp.job%TYPE;BEGINv_job:='PU_CLERK';FORr_empINc_emp(v_job)LOOPDBMS_OUTPUT.PUT_LINE('DEPT '||v_job||': '||r_emp.empname||'''s salary is '||r_emp.salary);ENDLOOP;END;/QueryOK,0rows ...
ID || '.' || CURRENT_VALUE; --拼接查询字符串 QUERY_ITEMS := QUERY_ITEMS || ',' || CURRENT_VALUE; END IF; ELSE CONDITIONS := CONDITIONS || ' = ' || ALIAS || '.' || CURRENT_VALUE || ' '; END IF; --循环值减1 SIGNS := SIGNS - 1; END LOOP; --拼接关联SQL TARGET_...