delimiter $$ CREATE FUNCTION `getChildidList`(rootId varchar(38)) RETURNS text DETERMINISTIC BEGIN DECLARE sTemp text; DECLARE sTempChd text; SET@@group_concat_max_len = 102400; SET sTemp = '$'; SET sTempChd = rootId; WHILE sTempChd IS NOT NULL DO SET sTemp = concat(sTemp, ',', sTempChd); SELECT group_concat(ORGA001) INTO sTempChd FROM hrsw_t_organ WHERE FIND_IN_SET(ORGA002, sTempChd) > 0; END WHILE; SET@@group_concat_max_len = 1024; RETURN SUBSTRING(sTemp,3); END; $$ 使用Oracle重写,Oracle版本为12c

delimiter $$ use dbstudent$$ create function fn_select_studentname (student_id int) returns smallint begin declare student_name varchar(50); select student_name = name from student where id = student_id; return student_name; end$$ delimiter ;如何修改

create function fn_select_studentname (student_id int) returns varchar(50) begin declare student_name varchar(50); select name into student_name from student where id = student_id; return ...

DELIMITER $$ use dbstudent$$ create function fn_select_studentname (student_id int) returns smallint begin declare student_name varchar(50); select student_name = name from student where id = student_id; return student_name; end$$ delimiter ;如何修改

create function fn_select_student_info (student_id int) returns int begin declare student_name varchar(50); declare age int; select student_name = name, age = age from student where id = ...

解释一下这段代码：delimiter $$ create trigger insert_stu after insert on Student for each row begin declare @cid varchar(30)； select @cid=Cid from inserted； update Class set Cnumber = Cnumber + 1 where Cid = @cid； end; $$ delimiter ;

declare 表示声明变量，varchar(30) 表示该变量是一个长度为 30 的字符串类型。接下来，使用 select 语句从 inserted 表中获取新插入的记录的 Cid 字段值，并将其赋值给 @cid 变量。inserted 是一个...

DELIMITER$$ -> CREATE PROCEDURE Cursor() -> BEGIN -> DECLARE 单据号 CHAR(9); ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DELIMITER$$ CREATE PROCEDURE Cursor() BEGIN DECLARE 单据号 CHAR(9)' at line 1

DECLARE total INT DEFAULT 0; my_loop: LOOP SET total = total + input_count; SET input_count = input_count - 1; IF input_count LEAVE my_loop; END IF; END LOOP; SELECT total AS result; END/...

delimiter // create function wzq_11() returns int deterministic begin declare rs int; select count(*) into rs from student; IF rs=0 THEN return '此表人数为空'; ELSE return rs; END IF; end // delimiter ; select wzq_11() as 学生人数 ;为这个代码每行都写上注释

create function wzq_11() returns int deterministic begin declare rs int; -- 声明一个整型变量 rs select count(*) into rs from student; -- 查询 student 表的总行数并存放在 rs 中 IF rs=0 THEN -- 如果...

cretae function fun1(n int) returns int deterministic begin declare sum int default 0; declare i int default 1; while i<=n do set sum := sum + i; set i := i + 1; end while; return sum; end; 哪里有错

CREATE FUNCTION fun1(n INT) RETURNS INT DETERMINISTIC BEGIN DECLARE sum INT DEFAULT 0; DECLARE i INT DEFAULT 1; WHILE i SET sum := sum + i; SET i := i + 1; END WHILE; RETURN sum; END // ...

DELIMITER $$ CREATE TRIGGER ghxz AFTER INSERT ON GH FOR EACH ROW BEGIN DECLARE rs VARCHAR(8); SET rs = NEW.Gh_no; IF rs >= 100 THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '挂号人数超过最大限度'; ROLLBACK; END IF; END $$ DELIMITER ; 1422 - Explicit or implicit commit is not allowed in stored function or trigger.

DECLARE rs VARCHAR(8); SET rs = NEW.Gh_no; IF rs >= 100 THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '挂号人数超过最大限度'; END IF; END $$ DELIMITER ; 这个触发器会在插入GH表的每一行数据后...

DELIMITER $$ create function CountActorTypePercentage(actor_name varchar(255), role_type_name varchar(255)) returns decimal(5,2) deterministic begin declare total_count int; declare role_count int; select count(distinct feature_id) into total_count from feature_work where person = actor_name; select count(distinct fw.feature_id) into role_count from feature_work fw join feature_role fr on fw.feature_id = fr.feature_id and fw.person = fr.person join role_type rt on fr.role_id = rt.role_id where fw.person = actor_name and rt.role_type = role_type_name; if total_count = 0 then return 0; else return (role_count / total_count) * 100; end if; end$$ DELIMITER ;" select CountActorTypePercentage("Chris Hemsworth", "god") as percentage;

CREATE FUNCTION CountActorTypePercentage(actor_type_input VARCHAR(50)) RETURNS DECIMAL(5,2) DETERMINISTIC BEGIN DECLARE total_count INT; DECLARE type_count INT; DECLARE percentage DECIMAL(5,2); -...

delimiter // create function compare_fun(Id1 char(10),Id2 char(10)) returns char(20) DETERMINISTIC begin declare Rid1 char(10); declare Rid2 char(10); declare pce1 Decimal(10,2); declare pce2 Decimal(10,2); declare Bn varchar(60); select Price into pce1 f

最后，使用 delimiter 命令将语句结束符设置为 //，以允许在函数定义中使用分号。然后使用 delimiter ; 命令将语句结束符设置回默认值。可以通过执行 SELECT compare_fun('B0001', 'B0002'); 语句来测试该...

delimiter // create function count_fun() /创建计数函数/ returns char(10) deterministic begin declare sumc char(20); select count() into sumc from bookinfo where Price >= 40; /返回图书价格不小于40的总数/ return sumc; end // delimiter ; select count_fun(); delimiter // /通过输入的图书编号来计算剩余书本的总价/ create function total_fun(Bid char(10)) returns decimal(10,2) deterministic begin declare pri decimal(10,2); declare qy char(20); declare totals decimal(10,2); select price into pri from bookinfo where bookid = Bid; select quantity into qy from booktype where bookid = Bid; set totals = pri qy; return totals; end // delimiter ; select total_fun('000001');

感谢您的提问！根据您提供的代码，我可以看出这是一段MySQL数据库的存储过程代码。对于您的第一个问题，我理解您想了解的是这段代码的作用。这段代码创建了一个名为count_fun的函数，用于返回图书价格不小于40的...

DELIMITER $$ CREATE TRIGGER jcxz BEFORE INSERT ON JC FOR EACH ROW BEGIN DECLARE rs VARCHAR(8); SELECT Jc_no INTO rs FROM JC WHERE Jc_no = NEW.Jc_no; IF rs >= 100 THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '检查人数超过最大限度'; ROLLBACK; END IF; END $$ DELIMITER ; 1422 - Explicit or implicit commit is not allowed in stored function or trigger.

DECLARE rs VARCHAR(8); SELECT Jc_no INTO rs FROM JC WHERE Jc_no = NEW.Jc_no; IF rs >= 100 THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '检查人数超过最大限度'; END IF; END $$ DELIMITER ; ...

解释一下delimiter $$ create function fu_checknum(v_bookno char(4)) returns varchar(20) begin declare v_num int(4); declare v_no char(4); select number into v_num from book where bookNo=v_bookno; select bookNo into v_no from borrow where bookNo=v_bookno and returnDate is NULL; if v_num=0 and v_no is NULL then delete from book where bookno=v_bookno; return '检查该书不存在，删除！'; else return '该书尚存在！'; end if; end$$ delimiter ;

函数的返回类型为 varchar(20)，表示函数返回的结果是一个最大长度为 20 的字符串。在函数体中，首先声明了两个局部变量 v_num 和 v_no，分别表示图书数量和借阅表中书籍编号。然后使用 SELECT 语句将 v_num 和 v_...

DELIMITER $$ CREATE TRIGGER ypxz AFTER INSERT ON CF FOR EACH ROW BEGIN DECLARE n INT; SELECT Sl INTO n FROM inserted; IF n >= 20 THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '处方药品超过最大限度'; ROLLBACK; END IF; END$$ DELIMITER ; 1422 - Explicit or implicit commit is not allowed in stored function or trigger.

SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '处方药品超过最大限度'; END IF; END$$ DELIMITER ; 请注意，我将ROLLBACK替换为了SIGNAL语句，并设置了SQLSTATE和MESSAGE_TEXT属性。这样，当触发器条件不满足...

DELIMITER $$ CREATE PROCEDURE insert_data_from_txt(IN file_path VARCHAR(255), IN file_name VARCHAR(255)) BEGIN DECLARE done INT DEFAULT FALSE; DECLARE line VARCHAR(255); DECLARE col1 VARCHAR(8); DECLARE col2 VARCHAR(5); DECLARE col3 VARCHAR(6); DECLARE file_cursor CURSOR FOR SELECT * FROM file_path; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; SET @query = CONCAT('SELECT * FROM ', file_path, file_name); PREPARE stmt FROM @query; OPEN file_cursor; FETCH file_cursor INTO line; WHILE NOT done DO SET col1 = TRIM(SUBSTRING(line, 1, 8)); SET col2 = TRIM(SUBSTRING(line, 9, 5)); SET col3 = TRIM(SUBSTRING(line, 14, 6)); INSERT INTO axsdc (name, aaaa, cccc) VALUES (col1, col2, col3); FETCH file_cursor INTO line; END WHILE; CLOSE file_cursor; END$$ DELIMITER ;

然后使用 DECLARE CURSOR 语句声明了一个游标 file_cursor，用于遍历文本文件中的每一行数据。接着使用 PREPARE 语句动态生成查询语句，并使用 OPEN 语句打开游标。之后进入一个 WHILE 循环，遍历文本文件...

use finance1; set global log_bin_trust_function_creators=1; drop function IF EXISTS get_deposit; /* 用create function语句创建符合以下要求的函数：依据客户编号计算该客户所有储蓄卡的存款总额。函数名为：get_Records。函数的参数名可以自己命名:*/ delimiter $$ create function get_deposit(client_id int) returns numeric(10,2) begin end$$ delimiter ;

CREATE FUNCTION get_deposit(client_id INT) RETURNS NUMERIC(10, 2) BEGIN DECLARE total_deposit NUMERIC(10, 2); SELECT SUM(deposit_amount) INTO total_deposit FROM savings_account WHERE client_id = ...

DELIMITER $$ CREATE FUNCTION fn_select_studentname(std_id INT) RETURNS VARCHAR(50) BEGIN DECLARE name VARCHAR(50); SELECT name INTO name FROM student WHERE id = std_id; RETURN name; END$$ DELIMITER ;

delimiter $$ use dbstudent$$ create function fn_select_studentname (student_id int) returns varchar(50) begin declare student_name varchar(50) select name into student_name from student where id = student_id; return student_name; end$$ delimiter ;错在哪

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delimiter $$ use dbstudent$$ create function fn_select_studentname (student_id int) returns varchar(50) begin declare student_name varchar(50) select name into student_name from student where id = student_id; return student_name; end$$ delimiter ;错在哪

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delimiter $$ use dbstudent$$ create function fn_select_studentname (student_id int) returns smallint begin declare student_name varchar(50); select student_name = name from student where id = student_id; return student_name; end$$ delimiter ;如何修改

DELIMITER $$ use dbstudent$$ create function fn_select_studentname (student_id int) returns smallint begin declare student_name varchar(50); select student_name = name from student where id = student_id; return student_name; end$$ delimiter ;如何修改

解释一下这段代码：delimiter $$ create trigger insert_stu after insert on Student for each row begin declare @cid varchar(30)； select @cid=Cid from inserted； update Class set Cnumber = Cnumber + 1 where Cid = @cid； end; $$ delimiter ;

delimiter // create function wzq_11() returns int deterministic begin declare rs int; select count(*) into rs from student; IF rs=0 THEN return '此表人数为空'; ELSE return rs; END IF; end // delimiter ; select wzq_11() as 学生人数 ;为这个代码每行都写上注释

cretae function fun1(n int) returns int deterministic begin declare sum int default 0; declare i int default 1; while i<=n do set sum := sum + i; set i := i + 1; end while; return sum; end; 哪里有错

delimiter // create function compare_fun(Id1 char(10),Id2 char(10)) returns char(20) DETERMINISTIC begin declare Rid1 char(10); declare Rid2 char(10); declare pce1 Decimal(10,2); declare pce2 Decimal(10,2); declare Bn varchar(60); select Price into pce1 f

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