題目描述
描述
獲取有獎(jiǎng)金的員工相關(guān)信息齐板。
CREATE TABLE `employees` (
`emp_no` int(11) NOT NULL,
`birth_date` date NOT NULL,
`first_name` varchar(14) NOT NULL,
`last_name` varchar(16) NOT NULL,
`gender` char(1) NOT NULL,
`hire_date` date NOT NULL,
PRIMARY KEY (`emp_no`));
CREATE TABLE `dept_emp` (
`emp_no` int(11) NOT NULL,
`dept_no` char(4) NOT NULL,
`from_date` date NOT NULL,
`to_date` date NOT NULL,
PRIMARY KEY (`emp_no`,`dept_no`));
create table emp_bonus(
emp_no int not null,
received datetime not null,
btype smallint not null);
CREATE TABLE `salaries` (
`emp_no` int(11) NOT NULL,
`salary` int(11) NOT NULL,
`from_date` date NOT NULL,
`to_date` date NOT NULL, PRIMARY KEY (`emp_no`,`from_date`));
給出emp_no、first_name、last_name甘磨、獎(jiǎng)金類(lèi)型btype橡羞、對(duì)應(yīng)的當(dāng)前薪水情況salary以及獎(jiǎng)金金額bonus。 bonus類(lèi)型btype為1其獎(jiǎng)金為薪水salary的10%济舆，btype為2其獎(jiǎng)金為薪水的20%卿泽，其他類(lèi)型均為薪水的30%。 當(dāng)前薪水表示to_date='9999-01-01'
輸出格式:
emp_no first_name last_name btype salary bonus
10001 Georgi Facello 1 88958 8895.8
10002 Bezalel Simmel 2 72527 14505.4
10003 Parto Bamford 3 43311 12993.3
10004 Chirstian Koblick 1 74057 7405.7
sql答案 case when then 的語(yǔ)法應(yīng)用
select e.emp_no,e.first_name,e.last_name,eb.btype,s.salary,
case
when eb.btype = 1 then s.salary * 0.1
when eb.btype =2 then s.salary * 0.2
else s.salary * 0.3
end bonus
FROM
employees as e,emp_bonus as eb,salaries as s
where e.emp_no = eb.emp_no and eb.emp_no = s.emp_no
and s.to_date = '9999-01-01'
