def safe_divide(a, b): if b == 0: return None # 或者可以抛出异常,或者返回默认值 return a / b # 使用示例 result = safe_divide(10, 0) if result is not None: print(f"Result: {result}") else: print("Error: Division by zero") 5. 其他数据库如何处理除以零的情况,以及 PostgreSQL...
CREATEORREPLACEPROCEDUREdivide_numbers(num1INTEGER,num2INTEGER)LANGUAGEplpgsqlAS$$DECLAREresultDECIMAL;BE...
\set SQLTERM / CREATE OR REPLACE PROCEDURE print_reciprocal (n NUMBER) AUTHID DEFINER IS BEGIN RAISE NOTICE '%', 1/n; EXCEPTION WHEN ZERO_DIVIDE THEN RAISE NOTICE 'Error:'; RAISE NOTICE '% is undefined', 1/n; END; / \set SQLTERM ; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11....
-- 被0除 declare pnum number; begin pnum := 1/0; exception when zero_divide then dbms_output.put_line('1:0不能做分母'); dbms_output.put_line('2:0不能做分母'); when value_error then dbms_output.put_line('算术或者转换错误'); when others then dbms_output.put_line('其他例外'); ...
LANGUAGEplpgsqlAS$$DECLAREresultDECIMAL;BEGINIFnum2=0THENRAISEEXCEPTION'Attempt to divide by zero';...
81 def regularize(xMat):#regularize by columns 82 inMat = xMat.copy() 83 inMeans = mean(inMat,0) #calc mean then subtract it off 84 inVar = var(inMat,0) #calc variance of Xi then divide by it 85 inMat = (inMat - inMeans)/inVar ...