我的存储过程遇到了一些问题。
我试图写一个＆＃34;创建脚本＆＃34;使用＆＃34;存储过程＆＃34;需要输入＆＃34; n＆＃34;在0-100000的区间内。
用户输入后，我希望所有信息都进入一个名为＆＃34; T＆＃34;的新表。
SELECT * FROM T;
我想要打印：
+----+------------+----------+---------------+---+----+-----+
| Id | First Namne| Last Name| Street Address| No| Zip| City|
+----+------------+----------+---------------+---+----+-----+
街道号码应在1-300范围内。
Zip应该是5个数字，并且不能以0开头。
即使我删除了ID列，每一行也必须是唯一的。
I've made 3 files:
1. Contains 500 unique First Names
2. Contains 500 unique Last Names
3. Contains 335 unique Adresses
我的目标是制作新表＆＃34; t＆＃34;接受随机的名字和随机的姓氏。这将需要1次地址300次并使地址不会上升300次然后继续到下一个地址，这样我的所有行都将是唯一的。enter code here
这是我在大脑崩溃前走了多远：
/*
* Sets database to users
*/
USE users;
/*
* Removes tables if exists
*/
DROP TABLE IF EXISTS t;
DROP TABLE IF EXISTS first_names;
DROP TABLE IF EXISTS last_names;
DROP TABLE IF EXISTS street_names;
/*
* Creating new tables
*/
-- Create table t
CREATE TABLE t(
player_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
first_name VARCHAR(20) NOT NULL,
last_name VARCHAR (20) NOT NULL,
street_name VARCHAR (30) NOT NULL,
street_number SMALLINT(3) NOT NULL,
zip MEDIUMINT(5) NOT NULL,
city VARCHAR(20) NOT NULL
);
-- Create table first_names
CREATE TABLE first_names (
first_name_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
first_name VARCHAR(20) NOT NULL
);
Source C:\Database\Inlamning\first_names.txt
-- Create table last_names
CREATE TABLE last_names (
last_name_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
last_name VARCHAR(20) NOT NULL
);
Source C:\Database\Inlamning\last_names.txt
-- Create table street_names
CREATE TABLE street_names (
street_name_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
street_name VARCHAR(30) NOT NULL
);
Source C:\Database\Inlamning\street_names.txt
/*
* Create PRECEDURE "generate_adress"
*/
DROP PROCEDURE IF EXISTS generate_adress;
DELIMITER $$
CREATE PROCEDURE generate_adress(x INT, fn VARCHAR(20), ln VARCHAR(20), sn VARCHAR (30), snno SMALLINT(3), zi MEDIUMINT(5), ci VARCHAR(20))
BEGIN
SELECT (SELECT CONCAT("generate_adress", NOW())) as "Start";
IF (x > 100000) THEN
SELECT ("Max allowed adresser are 100000, value set to 100000") AS "Number of address:";
SET x = 100000;
END IF;
INSERT INTO "t" (first_name, last_name, street_name, street_number, zip, city)
END$$
DELIMITER ;
CALL generate_adress(1000);
SELECT * FROM t;
非常感谢帮助！
答案 0 :(得分：0)
我建议使用以下高级伪代码，然后可以在行sql或SP中使用游标编写代码，和/或使用临时表或使用子查询保存代码等：
1-交叉连接名字和姓氏，这将为您提供250000行所有可能的唯一名称
2-交叉连接街道名称，其中一个表格包含1到300的数字，这将为您提供100500行唯一地址
3-从RAND（）（临时表T1）
排序的第一个交叉连接中选择n行4-从RAND（）（临时表T2）
排序的第二个交叉连接中选择n行5-在行号上加入T1和T2，这将是n个唯一行的结果
邮政编码可以计算为100000 * RAND（）
修改
伪代码更详细一点：
set @rownum=0
create table t1 as
(
select @rownum:=@rownum+1 as rownum, x.*
from (select firstname, lastname from firstnames, lastnames) as x limit 10
) x1
set @rownum=0
create table t2 as
(
select @rownum:=@rownum+1 as rownum, x.*
from (select number, streetname from streetnames, numbers) as x limit 10
) x1
select * from t1 join t2 on t1.rownum=t2.rownum
答案 1 :(得分：0)
我最终得到了这个解决方案！感谢您收到的帮助！
/*************************************************
*
* Andreas Ekman Newton Java 2
*
* CREATE -- Source C:\Database\Test\CREATE.txt
* File: -- Source C:\Database\Inlamning\first_names.txt - 358 Unique ID
* File: -- Source C:\Database\Inlamning\last_names.txt - 359 Unique ID
* File: -- Source C:\Database\Inlamning\street_names.txt - 335 Unique ID
* File: -- Source C:\Database\Inlamning\street_numbers.txt - 300 Uniqe ID
* File: -- Source C:\Database\Inlamning\zips.txt - 7 Uniqe ID
* File: -- Source C:\Database\Inlamning\cities.txt - 7 Uniqe ID
*
**************************************************/
/*
* Setting database to "Gamers"
*/
USE Gamers;
/*
* Creating new tables
*/
-- Create table t
DROP TABLE IF EXISTS t;
CREATE TABLE t(
player_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
first_name VARCHAR(20) NOT NULL,
last_name VARCHAR (20) NOT NULL,
street_name VARCHAR (30) NOT NULL,
street_number SMALLINT(3) NOT NULL,
zip MEDIUMINT(5) NOT NULL,
city VARCHAR(20) NOT NULL
);
-- Create table first_names
DROP TABLE IF EXISTS first_names;
CREATE TABLE first_names (
first_name_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
first_name VARCHAR(20) NOT NULL
);
Source C:\Database\Inlamning\first_names.txt
-- Create table last_names
DROP TABLE IF EXISTS last_names;
CREATE TABLE last_names (
last_name_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
last_name VARCHAR(20) NOT NULL
);
Source C:\Database\Inlamning\last_names.txt
-- Create table street_names
DROP TABLE IF EXISTS street_names;
CREATE TABLE street_names (
street_name_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
street_name VARCHAR(30) NOT NULL
);
Source C:\Database\Inlamning\street_names.txt
-- Create table street_numbers
DROP TABLE IF EXISTS street_numbers;
CREATE TABLE street_numbers (
street_number_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
street_number SMALLINT(30) NOT NULL
);
Source C:\Database\Inlamning\street_numbers.txt
-- Create table zip
DROP TABLE IF EXISTS zips;
CREATE TABLE zips (
zip_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
zip MEDIUMINT(5) NOT NULL
);
Source C:\Database\Inlamning\zips.txt
-- Create table citites
DROP TABLE IF EXISTS cities;
CREATE TABLE cities (
city_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
city VARCHAR(20) NOT NULL
);
Source C:\Database\Inlamning\cities.txt
/*
* Create PRECEDURE "generate_adress"
*/
DROP PROCEDURE IF EXISTS generate_adress;
DELIMITER $$
-- CREATE PROCEDURE generate_adress(x INT)
CREATE PROCEDURE generate_adress(x INT)
BEGIN
-- Declaring variables
DECLARE i INT DEFAULT 1;
DECLARE j INT DEFAULT 1;
DECLARE k INT DEFAULT 1;
DECLARE fname VARCHAR(20) DEFAULT 'error';
DECLARE lname VARCHAR(20) DEFAULT 'error';
DECLARE stname VARCHAR(30) DEFAULT 'error';
DECLARE stno SMALLINT(3) DEFAULT '0';
DECLARE zi MEDIUMINT(5) DEFAULT '0';
DECLARE ci VARCHAR(20) DEFAULT 'error';
-- Visualizing the start of generator
SELECT (SELECT CONCAT("generate_adress", NOW())) as "Start generator!";
-- Check call ID, max allowed input is 100000
IF (x > 100000) THEN
SELECT ("Max allowed addresses are 100000, value set to 100000") AS "Number of adresses";
SET x = 100000;
END IF;
-- Loop for creating inserts to table "t"
WHILE (i <=x) DO
-- Setting random value for numbers in the 100's range
SET @random = FLOOR((RAND()*300 +1));
-- Setting random value for numbers in the up to 7's range
SET @randomci = FLOOR((RAND()*7 +1));
-- Getting random name from first_names table
SET fname = (SELECT first_name FROM first_names WHERE first_name_id = @random); -- SELECT (fname) as 'first_name';
-- Getting random last name from last_names table
SET lname = (SELECT last_name FROM last_names WHERE last_name_id = @random);
-- Getting street name by ID = k
SET stname = (SELECT street_name FROM street_names WHERE street_name_id = k);
-- Getting street name by ID = j
SET stno = (SELECT street_number FROM street_numbers WHERE street_number_id = j);
-- Getting a random area code from zips table
SET zi = (SELECT zip FROM zips WHERE zip_id = @randomci);
-- Getting a random city from cities table
SET ci = (SELECT city FROM cities WHERE city_id = @randomci);
-- Insert data to table called "t"
INSERT INTO t (first_name, last_name, street_name, street_number, zip, city) VALUES(fname, lname, stname, stno, zi, ci);
-- Setting the "call generate_adress" counter to tick
SET i = i+1;
-- Setting street_name and street_number tick
SET j = j+1;
-- Variable counter
IF (j > 300) THEN
SET j = 1;
SET k = k+1;
END IF;
-- End of while loop
END WHILE;
-- Visualizing the start of generator
SELECT (SELECT CONCAT("generate_adress", NOW())) as "Stop generator!";
-- End of create procedure
END$$
-- Setting default Delimiter to ;
DELIMITER ;
-- Call command, innout "x" for creating number of x's adresses
CALL generate_adress(1000);
-- View all created addresses
SELECT * FROM t;