学习数据库必须掌握的54条SQL查询语句

建站1540 更新时间：2025-06-11 07:06:39

2023年6月21日发(作者：)

学习数据库必须掌握的54条SQL查询语句 1 --1、查找员⼯的编号、姓名、部门和出⽣⽇期，如果出⽣⽇期为空值，显⽰⽇期不详,并按部门排序输出,⽇期格式为yyyy-mm-dd。 2 select emp_no,emp_name,dept,isnull(convert(char(10),birthday,120),'⽇期不详') birthday 3 from employee 4 order by dept 5

6 --2、查找与喻⾃强在同⼀个单位的员⼯姓名、性别、部门和职称 7 select emp_no,emp_name,dept,title 8 from employee 9 where emp_name<>'喻⾃强' and dept in 10 (select dept from employee 11 where emp_name='喻⾃强') 12

13 --3、按部门进⾏汇总，统计每个部门的总⼯资 14 select dept,sum(salary) 15 from employee 16 group by dept 17

18 --4、查找商品名称为14⼨显⽰器商品的销售情况，显⽰该商品的编号、销售数量、单价和⾦额 19 select _id,qty,unit_price,unit_price*qty totprice 20 from sale_item a,product b 21 where _id=_id and prod_name='14⼨显⽰器' 22

23 --5、在销售明细表中按产品编号进⾏汇总，统计每种产品的销售数量和⾦额 24 select prod_id,sum(qty) totqty,sum(qty*unit_price) totprice 25 from sale_item 26 group by prod_id 27

28 --6、使⽤convert函数按客户编号统计每个客户1996年的订单总⾦额 29 select cust_id,sum(tot_amt) totprice 30 from sales 31 where convert(char(4),order_date,120)='1996' 32 group by cust_id 33

34 --7、查找有销售记录的客户编号、名称和订单总额 35 select _id,cust_name,sum(tot_amt) totprice 36 from customer a,sales b 37 where _id=_id 38 group by _id,cust_name 39

40 --8、查找在1997年中有销售记录的客户编号、名称和订单总额 41 select _id,cust_name,sum(tot_amt) totprice 42 from customer a,sales b 43 where _id=_id and convert(char(4),order_date,120)='1997' 44 group by _id,cust_name 45

46 --9、查找⼀次销售最⼤的销售记录 47 select order_no,cust_id,sale_id,tot_amt 48 from sales 49 where tot_amt= 50 (select max(tot_amt) 51 from sales) 52

53 --10、查找⾄少有3次销售的业务员名单和销售⽇期 54 select emp_name,order_date 55 from employee a,sales b

56 where emp_no=sale_id and _no in 57 (select sale_id 58 from sales 59 group by sale_id 60 having count(*)>=3) 61 order by emp_name 62 62

63 --11、⽤存在量词查找没有订货记录的客户名称 64 select cust_name 65 from customer a 66 where not exists 67 (select * 68 from sales b 69 where _id=_id) 70

71 --12、使⽤左外连接查找每个客户的客户编号、名称、订货⽇期、订单⾦额订货⽇期不要显⽰时间，⽇期格式为yyyy-mm-dd按客户编号排序，同⼀客户再按订单降序排序输出 72 select _id,cust_name,convert(char(10),order_date,120),tot_amt 73 from customer a left outer join sales b on _id=_id 74 order by _id,tot_amt desc 75

76 --13、查找16M DRAM的销售情况，要求显⽰相应的销售员的姓名、性别，销售⽇期、销售数量和⾦额，其中性别⽤男、⼥表⽰ 77 select emp_name 姓名, 性别= case when 'm' then '男' 78 when 'f' then '⼥'

79 else '未' 80 end, 81 销售⽇期= isnull(convert(char(10),_date,120),'⽇期不详'), 82 qty 数量, qty*unit_price as ⾦额 83 from employee a, sales b, sale_item c,product d 84 where _name='16M DRAM' and _id=_id and 85 _no=_id and _no=_no 86

87 --14、查找每个⼈的销售记录，要求显⽰销售员的编号、姓名、性别、产品名称、数量、单价、⾦额和销售⽇期 88 select emp_no 编号,emp_name 姓名, 性别= case when 'm' then '男' 89 when 'f' then '⼥'

90 else '未' 91 end, 92 prod_name 产品名称,销售⽇期= isnull(convert(char(10),_date,120),'⽇期不详'), 93 qty 数量, qty*unit_price as ⾦额 94 from employee a left outer join sales b on _no=_id , sale_item c,product d 95 where _id=_id and _no=_no 96

97 --15、查找销售⾦额最⼤的客户名称和总货款 98 select cust_name,_sum 99 from customer a,100 (select cust_id,cust_sum101 from (select cust_id, sum(tot_amt) as cust_sum102 from sales103 group by cust_id ) b104 where _sum =

105 ( select max(cust_sum)106 from (select cust_id, sum(tot_amt) as cust_sum107 from sales108 group by cust_id ) c )109 ) d110 where _id=_id

111

112 --16、查找销售总额少于1000元的销售员编号、姓名和销售额113 select emp_no,emp_name,_sum114 from employee a,115 (select sale_id,sale_sum116 from (select sale_id, sum(tot_amt) as sale_sum117 from sales118 group by sale_id ) b119 where _sum <1000

120 ) d121 where _no=_id

122

123 --17、查找⾄少销售了3种商品的客户编号、客户名称、商品编号、商品名称、数量和⾦额124 select _id,cust_name,_id,prod_name,,*_price125 from customer a, product b, sales c, sale_item d126 where _id=_id and _id=_id and

127 _no=_no and _id in (128 select cust_id129 from (select cust_id,count(distinct prod_id) prodid130 from (select cust_id,prod_id131 from sales e,sale_item f132 where _no=_no) g133 group by cust_id134 having count(distinct prod_id)>=3) h )135

136 --18、查找⾄少与世界技术开发公司销售相同的客户编号、名称和商品编号、商品名称、数量和⾦额137 select _id,cust_name,_id,prod_name,qty,qty*unit_price138 from customer a, product b, sales c, sale_item d139 where _id=_id and _id=_id and

140 _no=_no and not exists141 (select f.*142 from customer x ,sales e, sale_item f143 where cust_name='世界技术开发公司' and _id=_id and144 _no=_no and not exists145 ( select g.*146 from sale_item g, sales h147 where _id = _id and _no=_no and148 _id=_id)149 )150

151 19、查找表中所有姓刘的职⼯的⼯号，部门，薪⽔152 select emp_no,emp_name,dept,salary153 from employee154 where emp_name like '刘%'155

156 20、查找所有定单⾦额⾼于2000的所有客户编号157 select cust_id158 from sales159 where tot_amt>2000160

161 21、统计表中员⼯的薪⽔在4000-6000之间的⼈数162 select count(*)as ⼈数163 from employee164 where salary between 4000 and 6000165

166 22、查询表中的同⼀部门的职⼯的平均⼯资，但只查询＂住址＂是＂上海市＂的员⼯167 select avg(salary) avg_sal,dept

168 from employee

169 where addr like '上海市%'170 group by dept171

172 23、将表中住址为"上海市"的员⼯住址改为"北京市"173 update employee

174 set addr like '北京市'175 where addr like '上海市'176

177 24、查找业务部或会计部的⼥员⼯的基本信息。178 select emp_no,emp_name,dept179 from employee

180 where sex='F'and dept in ('业务','会计')181

182 25、显⽰每种产品的销售⾦额总和，并依销售⾦额由⼤到⼩输出。183 select prod_id ,sum(qty*unit_price)184 from sale_item

185 group by prod_id186 order by sum(qty*unit_price) desc187

188 26、选取编号界于'C0001'和'C0004'的客户编号、客户名称、客户地址。189 select CUST_ID,cust_name,addr190 from customer 190 from customer

191 where cust_id between 'C0001' AND 'C0004'192

193 27、计算出⼀共销售了⼏种产品。194 select count(distinct prod_id) as '共销售产品数'195 from sale_item

196

197 28、将业务部员⼯的薪⽔上调3%。198 update employee199 set salary=salary*1.03200 where dept='业务'201

202 29、由employee表中查找出薪⽔最低的员⼯信息。203 select *204 from employee205 where salary=206 (select min(salary )207 from employee )208

209 30、使⽤join查询客户姓名为"客户丙"所购货物的"客户名称","定单⾦额","定货⽇期","电话号码"210 select _id,_amt,_date,_no211 from customer a join sales b212 on _id=_id and cust_name like '客户丙'213

214 31、由sales表中查找出订单⾦额⼤于"E0013业务员在1996/10/15这天所接每⼀张订单的⾦额"的所有订单。215 select *216 from sales217 where tot_amt>all218 (select tot_amt

219 from sales

220 where sale_id='E0013'and order_date='1996/10/15')221 order by tot_amt222

223 32、计算'P0001'产品的平均销售单价224 select avg(unit_price)225 from sale_item226 where prod_id='P0001'227

228 33、找出公司⼥员⼯所接的定单229 select sale_id,tot_amt230 from sales231 where sale_id in

232 (select sale_id from employee233 where sex='F')234

235 34、找出同⼀天进⼊公司服务的员⼯236 select _no,_name,_hired237 from employee a238 join employee b239 on (_no!=_no and _hired=_hired)240 order by _hired241

242 35、找出⽬前业绩超过232000元的员⼯编号和姓名。243 select emp_no,emp_name244 from employee

245 where emp_no in246 (select sale_id247 from sales

248 group by sale_id249 having sum(tot_amt)<232000)250

251 36、查询出employee表中所有⼥职⼯的平均⼯资和住址在＂上海市＂的所有⼥职⼯的平均⼯资252 select avg(salary)253 from employee254 where sex like 'f'255 union256 select avg(salary)257 from employee258 where sex like 'f' and addr like '上海市%'259

260 37、在employee表中查询薪⽔超过员⼯平均薪⽔的员⼯信息。261 Select *

262 from employee

263 where salary>( select avg(salary)

264 from employee)265

266 38、找出⽬前销售业绩超过10000元的业务员编号及销售业绩，并按销售业绩从⼤到⼩排序。267 Select sale_id ,sum(tot_amt)268 from sales

269 group by sale_id

270 having sum(tot_amt)>10000271 order by sum(tot_amt) desc272

273 39、找出公司男业务员所接且订单⾦额超过2000元的订单号及订单⾦额。

274 Select order_no,tot_amt275 From sales ,employee276 Where sale_id=emp_no and sex='M' and tot_amt>2000277

278 40、查询sales表中订单⾦额最⾼的订单号及订单⾦额。279 Select order_no,tot_amt from sales

280 where tot_amt=(select max(tot_amt) from sales)281

282 41、查询在每张订单中订购⾦额超过4000元的客户名及其地址。283 Select cust_name,addr from customer a,sales b

284 where _id=_id and tot_amt>4000285

286 42、求出每位客户的总订购⾦额，显⽰出客户号及总订购⾦额，并按总订购⾦额降序排列。287 Select cust_id,sum(tot_amt) from sales288 Group by cust_id

289 Order by sum(tot_amt) desc290

291 43、求每位客户订购的每种产品的总数量及平均单价，并按客户号，产品号从⼩到⼤排列。292 Select cust_id,prod_id,sum(qty),sum(qty*unit_price)/sum(qty)293 From sales a, sale_item b294 Where _no=_no295 Group by cust_id,prod_id296 Order by cust_id,prod_id297

298 44、查询订购了三种以上产品的订单号。299 Select order_no

300 from sale_item301 Group by order_no302 Having count(*)>3303

304 45、查询订购的产品⾄少包含了订单3号中所订购产品的订单。305 Select distinct order_no306 From sale_item a307 Where order_no<>'3'and not exists (

308 Select * from sale_item b where order_no ='3' and not exists

309 (select * from sale_item c where _no=_no and _id=_id))310

311 46、在sales表中查找出订单⾦额⼤于"E0013业务员在1996/11/10这天所接每⼀张订单的⾦额"的所有订单，并显⽰承接这些订单的业务员和该订单的⾦额。312 Select sale_id,tot_amt from sales313 where tot_amt>all(select tot_amt

314 from sales

315 where sale_id='E0013' and order_date='1996-11-10')

316

317 47、查询末承接业务的员⼯的信息。318 Select *318 Select *319 From employee a320 Where not exists

321 (select * from sales b where _no=_id)322

323 48、查询来⾃上海市的客户的姓名，电话、订单号及订单⾦额。324 Select cust_name,tel_no,order_no,tot_amt325 From customer a ,sales b326 Where _id=_id and addr='上海市'327

328 49、查询每位业务员各个⽉的业绩，并按业务员编号、⽉份降序排序。329 Select sale_id,month(order_date), sum(tot_amt)

330 from sales

331 group by sale_id,month(order_date)332 order by sale_id,month(order_date) desc333

334 50、求每种产品的总销售数量及总销售⾦额，要求显⽰出产品编号、产品名称，总数量及总⾦额，并按产品号从⼩到⼤排列。

335 Select _id,prod_name,sum(qty),sum(qty*unit_price)336 From sale_item a,product b337 Where _id=_id

338 Group by _id,prod_name339 Order by _id340 51、查询总订购⾦额超过'C0002'客户的总订购⾦额的客户号，客户名及其住址。341 Select cust_id, cust_name,addr342 From customer343 Where cust_id in (select cust_id from sales

344 Group by cust_id345 Having sum(tot_amt)>346 (Select sum(tot_amt) from sales where cust_id='C0002'))347

348 52、查询业绩最好的的业务员号、业务员名及其总销售⾦额。349 select emp_no,emp_name,sum(tot_amt)350 from employee a,sales b351 where _no=_id352 group by emp_no,emp_name353 having sum(tot_amt)=354 (select max(totamt)355 from (select sale_id,sum(tot_amt) totamt356 from sales357 group by sale_id) c)358

359 53、查询每位客户所订购的每种产品的详细清单，要求显⽰出客户号，客户名，产品号，产品名，数量及单价。360 select _id, cust_name,_id,prod_name,qty, unit_price361 from customer a,sales b, sale_item c ,product d362 where _id=_id and _no=_no and _id=_id363

364 54、求各部门的平均薪⽔，要求按平均薪⽔从⼩到⼤排序。365 select dept,avg(salary)

366 from employee367 group by dept

368 order by avg(salary)相关资源：