sql: Creating a Delimited List from Table Rows

geovindu2025-09-01 17:41

mysql 8.0

sql 复制代码 
CREATE TABLE EMP (
    EMPNO INTEGER NOT NULL,
    ENAME VARCHAR(10),
    JOB VARCHAR(9),
    MGR INTEGER,
    HIREDATE DATE,
    SAL INTEGER,
    COMM INTEGER,
    DEPTNO INTEGER
);
  
INSERT INTO EMP VALUES
    (7369, 'SMITH', 'CLERK', 7902, '1980-12-17', 800, NULL, 20),
    (7499, 'ALLEN', 'SALESMAN', 7698, '1981-02-20', 1600, 300, 30),
    (7521, 'WARD', 'SALESMAN', 7698, '1981-02-22', 1250, 500, 30),
    (7566, 'JONES', 'MANAGER', 7839, '1981-04-02', 2975, NULL, 20),
    (7654, 'MARTIN', 'SALESMAN', 7698, '1981-09-28', 1250, 1400, 30),
    (7698, 'BLAKE', 'MANAGER', 7839, '1981-05-01', 2850, NULL, 30),
    (7782, 'CLARK', 'MANAGER', 7839, '1981-06-09', 2450, NULL, 10),
    (7788, 'SCOTT', 'ANALYST', 7566, '1982-12-09', 3000, NULL, 20),
    (7839, 'KING', 'PRESIDENT', NULL, '1981-11-17', 5000, NULL, 10),
    (7844, 'TURNER', 'SALESMAN', 7698, '1981-09-08', 1500, 0, 30),
    (7876, 'ADAMS', 'CLERK', 7788, '1983-01-12', 1100, NULL, 20),
    (7900, 'JAMES', 'CLERK', 7698, '1981-12-03', 950, NULL, 30),
    (7902, 'FORD', 'ANALYST', 7566, '1981-12-03', 3000, NULL, 20),
    (7934, 'MILLER', 'CLERK', 7782, '1982-01-23', 1300, NULL, 10);
  
CREATE TABLE DEPT (
    DEPTNO INTEGER,
    DNAME VARCHAR(14),
    LOC VARCHAR(13)
);
  
INSERT INTO DEPT VALUES
    (10, 'ACCOUNTING', 'NEW YORK'),
    (20, 'RESEARCH', 'DALLAS'),
    (30, 'SALES', 'CHICAGO'),
    (40, 'OPERATIONS', 'BOSTON');
  
 
-- 根据表中的行创建分隔列表
select deptno, group_concat(ename order by empno separator ',') as emps
 from emp
 group by deptno;

postgreql 16:

sql 复制代码 
CREATE TABLE EMP (
    EMPNO SERIAL PRIMARY KEY,
    ENAME VARCHAR(10),
    JOB VARCHAR(9),
    MGR INTEGER,
    HIREDATE DATE,
    SAL INTEGER,
    COMM INTEGER,
    DEPTNO INTEGER
);
  
INSERT INTO EMP VALUES
    (7369, 'SMITH', 'CLERK', 7902, '1980-12-17', 800, DEFAULT, 20),
    (7499, 'ALLEN', 'SALESMAN', 7698, '1981-02-20', 1600, 300, 30),
    (7521, 'WARD', 'SALESMAN', 7698, '1981-02-22', 1250, 500, 30),
    (7566, 'JONES', 'MANAGER', 7839, '1981-04-02', 2975, DEFAULT, 20),
    (7654, 'MARTIN', 'SALESMAN', 7698, '1981-09-28', 1250, 1400, 30),
    (7698, 'BLAKE', 'MANAGER', 7839, '1981-05-01', 2850, DEFAULT, 30),
    (7782, 'CLARK', 'MANAGER', 7839, '1981-06-09', 2450, DEFAULT, 10),
    (7788, 'SCOTT', 'ANALYST', 7566, '1982-12-09', 3000, DEFAULT, 20),
    (7839, 'KING', 'PRESIDENT', DEFAULT, '1981-11-17', 5000, DEFAULT, 10),
    (7844, 'TURNER', 'SALESMAN', 7698, '1981-09-08', 1500, 0, 30),
    (7876, 'ADAMS', 'CLERK', 7788, '1983-01-12', 1100, DEFAULT, 20),
    (7900, 'JAMES', 'CLERK', 7698, '1981-12-03', 950, DEFAULT, 30),
    (7902, 'FORD', 'ANALYST', 7566, '1981-12-03', 3000, DEFAULT, 20),
    (7934, 'MILLER', 'CLERK', 7782, '1982-01-23', 1300, DEFAULT, 10);
  
CREATE TABLE DEPT (
    DEPTNO INTEGER,
    DNAME VARCHAR(14),
    LOC VARCHAR(13)
);
  
INSERT INTO DEPT VALUES
    (10, 'ACCOUNTING', 'NEW YORK'),
    (20, 'RESEARCH', 'DALLAS'),
    (30, 'SALES', 'CHICAGO'),
    (40, 'OPERATIONS', 'BOSTON');
 
select * from EMP;
 
 
-- 根据表中的行创建分隔列表
select
  deptno,
  string_agg(ename, ',' order by empno) as emps  -- 修正：先分隔符，再ORDER BY
from emp
group by deptno;

sql sever 2019:

sql 复制代码 
CREATE TABLE EMP (
    EMPNO int PRIMARY KEY,
    ENAME VARCHAR(10),
    JOB VARCHAR(9),
    MGR int,
    HIREDATE DATE,
    SAL int,
    COMM int,
    DEPTNO int
);
  
INSERT INTO EMP VALUES
    (7369, 'SMITH', 'CLERK', 7902, '1980-12-17', 800, DEFAULT, 20),
    (7499, 'ALLEN', 'SALESMAN', 7698, '1981-02-20', 1600, 300, 30),
    (7521, 'WARD', 'SALESMAN', 7698, '1981-02-22', 1250, 500, 30),
    (7566, 'JONES', 'MANAGER', 7839, '1981-04-02', 2975, DEFAULT, 20),
    (7654, 'MARTIN', 'SALESMAN', 7698, '1981-09-28', 1250, 1400, 30),
    (7698, 'BLAKE', 'MANAGER', 7839, '1981-05-01', 2850, DEFAULT, 30),
    (7782, 'CLARK', 'MANAGER', 7839, '1981-06-09', 2450, DEFAULT, 10),
    (7788, 'SCOTT', 'ANALYST', 7566, '1982-12-09', 3000, DEFAULT, 20),
    (7839, 'KING', 'PRESIDENT', DEFAULT, '1981-11-17', 5000, DEFAULT, 10),
    (7844, 'TURNER', 'SALESMAN', 7698, '1981-09-08', 1500, 0, 30),
    (7876, 'ADAMS', 'CLERK', 7788, '1983-01-12', 1100, DEFAULT, 20),
    (7900, 'JAMES', 'CLERK', 7698, '1981-12-03', 950, DEFAULT, 30),
    (7902, 'FORD', 'ANALYST', 7566, '1981-12-03', 3000, DEFAULT, 20),
    (7934, 'MILLER', 'CLERK', 7782, '1982-01-23', 1300, DEFAULT, 10);
  
CREATE TABLE DEPT (
    DEPTNO int,
    DNAME VARCHAR(14),
    LOC VARCHAR(13)
);
  
INSERT INTO DEPT VALUES
    (10, 'ACCOUNTING', 'NEW YORK'),
    (20, 'RESEARCH', 'DALLAS'),
    (30, 'SALES', 'CHICAGO'),
    (40, 'OPERATIONS', 'BOSTON');
 
select * from EMP;
 
-- 根据表中的行创建分隔列表
select
  deptno,
  STRING_AGG(ename, ',') WITHIN GROUP (ORDER BY empno) as emps  -- 核心修正：排序逻辑放WITHIN GROUP内
from emp
group by deptno;

oracel 21c:

sql 复制代码 
-- 1. 创建 EMP 表：给 COMM 加 DEFAULT 0，日期字段用 DATE 类型（Oracle 原生支持）
CREATE TABLE EMP (
    EMPNO INT PRIMARY KEY,          -- INT 在 Oracle 中是 NUMBER(38) 的别名，没问题
    ENAME VARCHAR2(10),             -- 推荐用 VARCHAR2（Oracle 官方推荐，兼容性更好）
    JOB VARCHAR2(9),
    MGR INT,
    HIREDATE DATE,                  -- Oracle 日期类型为 DATE，无需额外定义
    SAL INT,
    COMM INT DEFAULT 0,             -- 关键修正：给 COMM 加默认值 0，支持插入时用 DEFAULT
    DEPTNO INT
);
  
-- 2. 插入 EMP 数据：日期用 TO_DATE 显式转换格式，COMM 可写 DEFAULT 或直接用 0
INSERT ALL
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7369, 'SMITH', 'CLERK', 7902, TO_DATE('1980-12-17', 'YYYY-MM-DD'), 800, DEFAULT, 20)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7499, 'ALLEN', 'SALESMAN', 7698, TO_DATE('1981-02-20', 'YYYY-MM-DD'), 1600, 300, 30)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7521, 'WARD', 'SALESMAN', 7698, TO_DATE('1981-02-22', 'YYYY-MM-DD'), 1250, 500, 30)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7566, 'JONES', 'MANAGER', 7839, TO_DATE('1981-04-02', 'YYYY-MM-DD'), 2975, DEFAULT, 20)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7654, 'MARTIN', 'SALESMAN', 7698, TO_DATE('1981-09-28', 'YYYY-MM-DD'), 1250, 1400, 30)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7698, 'BLAKE', 'MANAGER', 7839, TO_DATE('1981-05-01', 'YYYY-MM-DD'), 2850, DEFAULT, 30)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7782, 'CLARK', 'MANAGER', 7839, TO_DATE('1981-06-09', 'YYYY-MM-DD'), 2450, DEFAULT, 10)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7788, 'SCOTT', 'ANALYST', 7566, TO_DATE('1982-12-09', 'YYYY-MM-DD'), 3000, DEFAULT, 20)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7839, 'KING', 'PRESIDENT', DEFAULT, TO_DATE('1981-11-17', 'YYYY-MM-DD'), 5000, DEFAULT, 10)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7844, 'TURNER', 'SALESMAN', 7698, TO_DATE('1981-09-08', 'YYYY-MM-DD'), 1500, 0, 30)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7876, 'ADAMS', 'CLERK', 7788, TO_DATE('1983-01-12', 'YYYY-MM-DD'), 1100, DEFAULT, 20)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7900, 'JAMES', 'CLERK', 7698, TO_DATE('1981-12-03', 'YYYY-MM-DD'), 950, DEFAULT, 30)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7902, 'FORD', 'ANALYST', 7566, TO_DATE('1981-12-03', 'YYYY-MM-DD'), 3000, DEFAULT, 20)
     
    INTO EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
    VALUES (7934, 'MILLER', 'CLERK', 7782, TO_DATE('1982-01-23', 'YYYY-MM-DD'), 1300, DEFAULT, 10)
SELECT 1 FROM DUAL; -- 必须添加此句，Oracle 要求 INSERT ALL 以子查询结束
 
 
  
-- 3. 创建 DEPT 表：给 DEPTNO 加 PRIMARY KEY，保证唯一性和关联能力
CREATE TABLE DEPT (
    DEPTNO INT PRIMARY KEY,         -- 关键修正：DEPTNO 设为主键
    DNAME VARCHAR2(14),
    LOC VARCHAR2(13)
);
  
-- 4. 插入 DEPT 数据（无语法问题，直接使用）
INSERT ALL
INTO DEPT VALUES
    (10, 'ACCOUNTING', 'NEW YORK')
INTO DEPT VALUES    (20, 'RESEARCH', 'DALLAS')
INTO DEPT VALUES    (30, 'SALES', 'CHICAGO')
 INTO DEPT VALUES   (40, 'OPERATIONS', 'BOSTON')   
SELECT 1 FROM DUAL;
-- 最后提交事务（Oracle 默认手动提交，需显式执行）
 
 
select * from EMP;
 
select * from DEPT;
 
-- 根据表中的行创建分隔列表
select deptno,
ltrim(sys_connect_by_path(ename,','),',') emps
 from (
 select deptno,
 ename,
 row_number() over
 (partition by deptno order by empno) rn,
 count(*) over
 (partition by deptno) cnt
 from emp
 )
 where level = cnt
 start with rn = 1
 connect by prior deptno = deptno and prior rn = rn-1;
相关推荐
WangJunXiang618 分钟前
第09章：PostgreSQL日常维护
数据库·postgresql
爱莉希雅&&&1 小时前
linux中MySQL数据库备份恢复的四种方法（更新中）
linux·数据库·mysql·数据库备份·mysqldumper
荒川之神1 小时前
Oracle 数据仓库星座模型（Galaxy Model）设计原则
数据库·数据仓库·oracle
枕布响丸辣1 小时前
Python 操作 MySQL 数据库从入门到精通
数据库·python·mysql
zxrhhm2 小时前
SQLServer限制特定数据库的CPU使用率，确保关键业务系统有足够的资源
数据库·sqlserver
Java开发追求者2 小时前
windows卸载mysql教程
mysql·mysql卸载
dyyshb3 小时前
PostgreSQL 终极兜底方案
数据库·postgresql
曹牧3 小时前
Oracle：
数据库·oracle
草莓熊Lotso3 小时前
【Linux 线程进阶】进程 vs 线程资源划分 + 线程控制全详解
java·linux·运维·服务器·数据库·c++·mysql
buhuimaren_3 小时前
pg日常维护
数据库·oracle
热门推荐
01GitHub 镜像站点02一周AI热点速览（2026.03.31-04.06）：GPT-6曝光、谷歌开源Gemma 4、资本狂飙与模型军备竞赛03OpenClaw 请求超时 llm request timed out 怎么解决？3 种方案实测，附完整排查流程04AI 编程效率翻倍：Superpowers Skills 上手清单 + 完整指南05MySQL表约束详解：8大核心约束实战指南06Oh My Codex 快速使用指南07CodeBuddy与WorkBuddy深度对比：腾讯两款AI工具差异及实操指南08VMware Workstation Pro 17 虚拟机完整安装教程（2026最新）09Qwen3.5-Omni与Qwen3.6模型全面解析（含测评/案例/使用教程）10UV安装并设置国内源