MySQL 2021 个税计算公式，自定义函数
2024-06-05 03:56:48
1、目的
根据最新的新个税计算，自定义mysql函数，实现根据传入参数计算出当月应缴的税额。
2、代码
CREATE DEFINER=`root`@`%` FUNCTION `TaxFunc`( -- 应发工资salary decimal(14,4), -- 起征税额base decimal(14,4), -- 保险insurance DECIMAL(14,4), -- 公积金 housing_fund DECIMAL(14,4), -- 专项扣除special_item DECIMAL(14,4), -- 月份mon int) RETURNS decimal(14,4)
BEGINDECLARE Jan DECIMAL(14,4);DECLARE Feb DECIMAL(14,4);DECLARE Mar DECIMAL(14,4);DECLARE Apr DECIMAL(14,4);DECLARE May DECIMAL(14,4);DECLARE Jun DECIMAL(14,4);DECLARE Jul DECIMAL(14,4);DECLARE Aug DECIMAL(14,4);DECLARE Sep DECIMAL(14,4);DECLARE Oct DECIMAL(14,4);DECLARE Nov DECIMAL(14,4);DECLARE Dece DECIMAL(14,4);DECLARE income DECIMAL(14,4);-- 1月-- 所得额 = （工资 - 起征税额 - 社保 - 公积金 - 专项扣除）* 月份set income = (salary-base-insurance-housing_fund-special_item) * 1;set Jan = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920))))));set Jan = IF(salary <= base, 0, Jan);-- 2月set income = (salary-base-insurance-housing_fund-special_item) * 2;set Feb = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920)))))) - Jan;set Feb = IF(salary <= base, 0, Feb);-- 3月set income = (salary-base-insurance-housing_fund-special_item) * 3;set Mar = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920)))))) - Jan - Feb;set Mar = IF(salary <= base, 0, Mar);-- 4月set income = (salary-base-insurance-housing_fund-special_item) * 4;set Apr = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920)))))) - Jan - Feb - Mar;set Apr = IF(salary <= base, 0, Apr);-- 5月set income = (salary-base-insurance-housing_fund-special_item) * 5;set May = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920)))))) - Jan - Feb - Mar - Apr;set May = IF(salary <= base, 0, May);-- 6月set income = (salary-base-insurance-housing_fund-special_item) * 6;set Jun = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920)))))) - Jan - Feb - Mar - Apr - May;set Jun = IF(salary <= base, 0, Jun);-- 7月set income = (salary-base-insurance-housing_fund-special_item) * 7;set Jul = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920)))))) - Jan - Feb - Mar - Apr - May - Jun;set Jul = IF(salary <= base, 0, Jul);-- 8月set income = (salary-base-insurance-housing_fund-special_item) * 8;set Aug = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920)))))) - Jan - Feb - Mar - Apr - May - Jun - Jul;set Aug = IF(salary <= base, 0, Aug);-- 9月set income = (salary-base-insurance-housing_fund-special_item) * 9;set Sep = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920)))))) - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug;set Sep = IF(salary <= base, 0, Sep);-- 10月set income = (salary-base-insurance-housing_fund-special_item) * 10;set Oct = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920)))))) - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug - Sep;set Oct = IF(salary <= base, 0, Oct);-- 11月set income = (salary-base-insurance-housing_fund-special_item) * 11;set Nov = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920)))))) - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug - Sep - Oct;set Nov = IF(salary <= base, 0, Nov);-- 12月set income = (salary-base-insurance-housing_fund-special_item) * 12;set Dece = IF(income <= 36000,income*0.03,IF(income <=144000,income*0.1-2520,IF(income<=300000,income*0.2-16920,IF(income<=420000,income*0.25-31920,IF(income<=660000,income*0.3-52920,IF(income<=960000,income*0.35-85920,income*0.45-181920)))))) - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug - Sep - Oct - Nov;set Dece = IF(salary <= base, 0, Dece);RETURN IF(mon = 1,Jan,IF(mon=2,Feb,IF(mon=3,Mar,IF(mon=4,Apr,IF(mon=5,May,IF(mon=6,Jun,IF(mon=7,Jul,IF(mon=8,Aug,IF(mon=9,Sep,IF(mon=10,Oct,IF(mon=11,Nov,Dece)))))))))));
END
3、测试
如果：一个员工每个月是32000元工资，保险扣3000元，公积金扣1500元，专项附加扣2200元。那么1月到4月的每个月应缴个税金额：
SELECTTaxFunc ( 32000, 5000, 3000, 1500, 2200, 1 ) 一月,TaxFunc ( 32000, 5000, 3000, 1500, 2200, 2 ) 二月,TaxFunc ( 32000, 5000, 3000, 1500, 2200, 3 ) 三月,TaxFunc ( 32000, 5000, 3000, 1500, 2200, 4 ) 四月;
结果：
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