The syntax for the NVL2 function in Oracle/PLSQL is: NVL2( string1, value_if_not_null, value_if_null ) Parameters or Arguments string1 The string to test for a null value. value_if_not_null The value returned ifstring1isnotnull. ...
Summary: in this tutorial, you will learn how to use the Oracle NVL2() function to substitute a null value with different options. Oracle NVL2() function overview The Oracle NVL2() function is an extension of the NVL() function with different options based on whether a NULL value exists. ...
COALESCEreturns the first non-nullexprin the expression list. You must specify at least two expressions. If all occurrences ofexprevaluate to null, then the function returns null. 该函数正在括号里全数的表达式中返回第一个非空值,假设都是空值,则返回空值,表达式最少是两个。
SQL> insert into t1 values(9);--插入3行数据,数据值都是9 SQL> create or replace function sleep_now return number is 2 i number; 3 begin 4 i :=0; 5 while8 6 i<=1000000 7 loop 8 i :=i+1; 9 end loop; 10 return i; 11 end; 12 / --创建一个sleep_now函数,目的是为了加长sql...
SQL> create or replace function sleep_now return number is 2 i number; 3 begin 4 i :=0; 5 while8 6 i<=1000000 7 loop 8 i :=i+1; 9 end loop; 10 return i; 11 end; 12 / --创建一个sleep_now函数,目的是为了加长sql执行的时间 ...
This function is useful for mapping NaN values to NULL. 语法– sql NANVL( n1 , n2 ) 考虑以下名为 nanvl_demo 的表格: 示例– ```sql SELECT bin_float, NANVL(bin_float,0) FROM nanvl_demo; ``` 输出: 参考:Oracle 9i SQL 入门(第 1 册) 版权属于:月萌API www.moonapi.com,转载请...
Ifexpr1is NULL, the function returns the value ofexpr3. Syntax NVL2(expr1, expr2, expr3) Parameters Return type Whenexpr1is NULL, ifexpr3is NULL as well, the function returnsNULL. Ifexpr3is not NULL, the return type is as described inNote. ...
We will illustrate some Snowflake functions that deal with NULLs that are missing in SQL Server. We will also discuss how the corresponding logic can be implemented in SQL. Let’s go! NVL2 SQL Server does not support the NVL2 function (it is worth mentioning that ORACLE supports it...
I modified signature of nvl2 function. Now it is more close to Oracle. Unfortunately, it can break extension update due function signature change 3bb5617 Author zyl6628156 commented 11 days ago Thanks, my test environment, no effect. zyl6628156 closed this 11 days ago Sign...
Function Procedure Packages Trigger SQL PLUS Session Environment System Tables Data Dictionary System Packages Object Oriented XML Large Objects Transaction User PrivilegeCheck constraint with decode and nvl2 : Check « Table « Oracle PL/SQL TutorialOracle...