EXP 오라클 함수 [Oracle, Pandas, R Prog, Dplyr, Sqldf, Pandasql, Data.Table, DuckDB]

* 파이썬 & R 패키지 호출 및 예제 데이터 생성 링크

---

[ EXP Oracle Function ]

 

---

EXP함수는 e의 n 제곱 값을 반환한다. (e=2.71828183) 이 함수는 인수와 같은 타입의 값을 반환한다.

 

• 함수 설명 : EXP 오라클 함수 링크

 

---

1. Oracle(오라클)

 

Oracle Programming

SELECT EXP(4) "e to the 4th power" 
FROM   DUAL;

 

Results

e to the 4th power
----------------------------------------------
54.59815003314423907811026120286087840308

 

---

2. Python Pandas(파이썬)

 

Python Programming

import math

math.exp(4)

 

Results

54.598150033144236

 

---

3. R Programming (R Package)

 

R Programming

%%R

exp(4)

 

Results

[1] 54.59815

 

---

4. R Dplyr Package

 

R Programming

%%R

emp %>%
  dplyr::mutate(exp_4 = exp(4)) %>%
  head()

 

Results

# A tibble: 6 x 9
  empno ename  job        mgr hiredate     sal  comm deptno exp_4
  <dbl> <chr>  <chr>    <dbl> <date>     <dbl> <dbl>  <dbl> <dbl>
1  7369 SMITH  CLERK     7902 1980-12-17   800    NA     20  54.6
2  7499 ALLEN  SALESMAN  7698 1981-02-20  1600   300     30  54.6
3  7521 WARD   SALESMAN  7698 1981-02-22  1250   500     30  54.6
4  7566 JONES  MANAGER   7839 1981-04-02  2975    NA     20  54.6
5  7654 MARTIN SALESMAN  7698 1981-09-28  1250  1400     30  54.6
6  7698 BLAKE  MANAGER   7839 1981-03-01  2850    NA     30  54.6

 

 

---

5. R sqldf Package

 

R Programming

%%R

sqldf(" select exp(4) exp_4 ")

 

Results

     exp_4
1 54.59815

 

 

---

6. Python pandasql Package

 

Python Programming

ps.sqldf(" select exp( 4) from emp  ")

 

---

 

Python Programming

import pandasql as ps
var = math.exp(4)

query = "SELECT {}  ".format(var)
ps.sqldf(query, globals())

 

 

Results

	54.598150033144236
0	54.59815​

 

 

---

7. R data.table Package

 

R Programming

%%R

DT          <- data.table(emp)
dept_DT     <- data.table(dept)

DT[, exp_4 := exp(4)][1:5, ]

 

Results

   empno  ename      job  mgr   hiredate  sal comm deptno    exp_4
1:  7369  SMITH    CLERK 7902 1980-12-17  800   NA     20 54.59815
2:  7499  ALLEN SALESMAN 7698 1981-02-20 1600  300     30 54.59815
3:  7521   WARD SALESMAN 7698 1981-02-22 1250  500     30 54.59815
4:  7566  JONES  MANAGER 7839 1981-04-02 2975   NA     20 54.59815
5:  7654 MARTIN SALESMAN 7698 1981-09-28 1250 1400     30 54.59815

 

---

8. Python DuckDB의 SQL

 

Python Programming

%%sql
  SELECT EXP(4) "e to the 4th power"

 

Python Programming

duckdb.sql(' SELECT EXP(4) "e to the 4th power" ').df()

 

Results

   e to the 4th power
0            54.59815

 

 

---

Insa-dong, Jongno-gu, Seoul, South Korea (https://unsplash.com/photos/I5l81lgcRsA)

  --------------------------------------------  

 

[Oracle, Pandas, R Prog, Dplyr, Sqldf, Pandasql, Data.Table] 오라클 함수와 R & Python 비교 사전 목록? 링크

 

오라클 SQL 함수(Oracle SQL Function) 목록 리스트 링크

 

[SQL, Pandas, R Prog, Dplyr, SQLDF, PANDASQL, DATA.TABLE] SQL EMP 예제로 만나는 테이블 데이터 처리 방법 리스트 링크 링크