drop_function.md

# 删除函数

Joe 将计税逻辑放到了 sp_idt 中，现在不需要 individual_income_tax 函数了，他应该怎样删除这个函数？

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* `show tables;` 列出所有表

## 答案

```sql
drop function individual_income_tax;
```

## 选项

### A

```sql
delete function individual_income_tax;
```

### B

```sql
remove function individual_income_tax;
```


### C

```sql
drop function individual_income_tax(decimal(12, 4));
```