diff --git "a/\347\216\213\344\270\226\350\264\242/\344\275\234\344\270\232.sql" "b/\347\216\213\344\270\226\350\264\242/\344\275\234\344\270\232.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..1f50239075a77feeaeb348c59ea24f9d1560d163
--- /dev/null
+++ "b/\347\216\213\344\270\226\350\264\242/\344\275\234\344\270\232.sql"
@@ -0,0 +1,65 @@
+--1. 查询出武汉地区所有的员工信息，要求显示部门名称以及员工的详细资料
+
+select * from People 
+inner join Department on People.DepartmentId=Department.DepartmentId
+where PeopleAddress='武汉'
+
+--2. 查询出武汉地区所有的员工信息，要求显示部门名称，职级名称以及员工的详细资料
+
+select * from People 
+inner join Department on People.DepartmentId=Department.DepartmentId
+inner join Rank on People.RankId=Rank.RankId
+where PeopleAddress ='武汉' 
+
+--3. 根据部门分组统计员工人数，员工工资总和，平均工资，最高工资和最低工资。
+
+select  DepartmentName,COUNT(People.DepartmentId)人数,SUM(PeopleSalary)工资总和,AVG(PeopleSalary)平均工资,MAX(PeopleSalary)最高工资,MIN(PeopleSalary)最低工资 from People 
+inner join Department on People.DepartmentId=Department.DepartmentId
+group by DepartmentName
+
+--4. 根据部门分组统计员工人数，员工工资总和，平均工资，最高工资和最低工资，平均工资在10000 以下的不参与统计，并且根据平均工资降序排列。
+
+select  DepartmentName,COUNT(People.DepartmentId)人数,SUM(PeopleSalary)工资总和,AVG(PeopleSalary)平均工资,MAX(PeopleSalary)最高工资,MIN(PeopleSalary)最低工资 from People 
+inner join Department on People.DepartmentId=Department.DepartmentId
+group by DepartmentName
+having AVG(PeopleSalary)>=10000
+order by AVG(PeopleSalary) desc
+
+--5. 根据部门名称，然后根据职位名称，分组统计员工人数，员工工资总和，平均工资，最高工资和最低工资
+
+select  DepartmentName,RankId,COUNT(People.DepartmentId)人数,SUM(PeopleSalary)工资总和,AVG(PeopleSalary)平均工资,MAX(PeopleSalary)最高工资,MIN(PeopleSalary)最低工资 from People 
+inner join Department on People.DepartmentId=Department.DepartmentId
+group by RankId,DepartmentName
+
+--6.查询出巨蟹 6.22--7.22 的员工信息
+
+select * from People where MONTH(PeopleBirth)+CONVERT(float,DAY(PeopleBirth))/100 between 6.22 and 7.22
+
+--7.查询所有员工信息，添加一列显示属相(鼠,牛,虎,兔,龙,蛇,马,羊,猴,鸡,狗,猪)
+
+select *, case 
+	when year(PeopleBirth)%12 =0 
+	then '猴'
+	when YEAR(PeopleBirth)%12=1
+	then '鸡'
+	when YEAR(PeopleBirth)%12=2
+	then '狗'
+	when YEAR(PeopleBirth)%12=3
+	then '猪'
+	when YEAR(PeopleBirth)%12=4
+	then '鼠'
+	when YEAR(PeopleBirth)%12=5
+	then '牛'
+	when YEAR(PeopleBirth)%12=6
+	then '虎'
+	when YEAR(PeopleBirth)%12=7
+	then '兔'
+	when YEAR(PeopleBirth)%12=8
+	then '龙'
+	when YEAR(PeopleBirth)%12=9
+	then '蛇'
+	when YEAR(PeopleBirth)%12=10
+	then '马'
+	when YEAR(PeopleBirth)%12=11
+	then '羊'
+	end 生肖  from People	
\ No newline at end of file
diff --git "a/\347\216\213\344\270\226\350\264\242/\347\254\254\344\272\214\350\212\202\350\257\276\347\254\224\350\256\260.md" "b/\347\216\213\344\270\226\350\264\242/\347\254\254\344\272\214\350\212\202\350\257\276\347\254\224\350\256\260.md"
new file mode 100644
index 0000000000000000000000000000000000000000..ffd706a81a480c72fb448728b472cc3db8cfed3e
--- /dev/null
+++ "b/\347\216\213\344\270\226\350\264\242/\347\254\254\344\272\214\350\212\202\350\257\276\347\254\224\350\256\260.md"
@@ -0,0 +1,39 @@
+#  1.模糊查询
+
+```
+[]：代表匹配范围内
+[^]：代表匹配不在范围内
+select * from Department where DepartmentId like   '[1-3]'
+
+// [1-3] == 1,2,3
+
+select * from Department where DepartmentId like   '[^1-3]'
+
+//[^1-3] == 4
+```
+
+# 2.CONVERT()与CAST()函数:
+
+```
+convert(decimal(13,2),12.45454)
+cast(12.45454 as decimal(13,2))
+```
+
+# 3.时间函数
+
+```
+select DATEDIFF(day, '2019-08-20', getDate());    --获取指定时间单位的差值
+SELECT DATEADD(MINUTE,-5,GETDATE())               --加减时间,此处为获取五分钟前的时间,MINUTE 表示分钟，可为 YEAR,MONTH,DAY,HOUR
+select DATENAME(month, getDate());                --当前月份
+select DATENAME(WEEKDAY, getDate());              --当前星期几
+select DATEPART(month, getDate());                --当前月份
+select DAY(getDate());                            --返回当前日期天数
+select MONTH(getDate());                          --返回当前日期月数
+select YEAR(getDate());                           --返回当前日期年数
+
+SELECT CONVERT(VARCHAR(22),GETDATE(),20)          --2020-01-09 14:46:46
+SELECT CONVERT(VARCHAR(24),GETDATE(),21)          --2020-01-09 14:46:55.91
+SELECT CONVERT(VARCHAR(22),GETDATE(),23)		  --2020-01-09
+SELECT CONVERT(VARCHAR(22),GETDATE(),24)          --15:04:07
+Select CONVERT(varchar(20),GETDATE(),14)          --15:05:49:330
+```
\ No newline at end of file