**Contents**show

## How do you check if a function is even or odd in PL SQL?

**PL/SQL Program to Check Number is Odd or Even**

- declare.
- n number:=&n;
- begin.
- if mod(n,2)=0.
- then.
- dbms_output.put_line(‘number is even’);
- else.
- dbms_output.put_line(‘number is odd’);

## How do you determine if a number is even or odd in Oracle?

**Selecting ODD or EVEN rows from a table**

- Write a subquery with an ORDER BY clause. Along with the data columns, select the pseudocolumn rownum with an alias, say rn.
- In the outer query, reference the alias rn and use the mod function to get odd rows or even rows.

## How do you check if a number is even in mysql?

If you are evaluating rational numbers as EVEN or ODD, **the MOD function** could be used. The MOD(x, y) function returns the remainder of X divided by Y. We can simply use this function to determine if a value is EVEN or ODD by passing the number to evaluate as X and 2 as Y.

## How do I run a PL SQL program?

**Text Editor**

- Type your code in a text editor, like Notepad, Notepad+, or EditPlus, etc.
- Save the file with the . sql extension in the home directory.
- Launch the SQL*Plus command prompt from the directory where you created your PL/SQL file.
- Type @file_name at the SQL*Plus command prompt to execute your program.

## What is MOD function in SQL?

SQL MOD() function is **used to get the remainder from a division**. The SQL DISTINCT command along with the SQL MOD() function is used to retrieve only unique records depending on the specified column or expression. Syntax: MOD( dividend, divider ) PostgreSQL and Oracle.

## How do you check if a number is even in SQL?

To find and return the records with the odd or even values, the most simple way is to **check the remainder when we divide the column value by 2**. When the remainder is 0, that’s an even number, otherwise, that’s an odd number.

## How do I retrieve alternate rows in SQL?

**How to get the alternate rows or records from table in sql server**

- ;WITH PRS (Name, Gender, R)
- AS.
- SELECT NAME, GENDER, ROW_NUMBER() OVER(PARTITION BY GENDER ORDER BY GENDER) AS R.
- FROM #PERSON.
- SELECT NAME, GENDER FROM PRS ORDER BY R, GENDER DESC.

## What is the difference between char and VarChar2?

Hence it is advised to use Char datatype when **the length of the character string is fixed and will not change in the future**. If the length of the character string is not fixed, then VarChar2 is preferred.

…

Difference between char, varchar and VARCHAR2 in Oracle.

Sno | Char | VarChar/VarChar2 |
---|---|---|

1 | Char stands for “Character” | VarChar/VarChar2 stands for Variable Character |

## What is upper in SQL query?

In SQL Server (Transact-SQL), the UPPER function **converts all letters in the specified string to uppercase**.

## How do I find the shortest and longest name in SQL?

**“how to find shortest and longest name in sql” Code Answer**

- # IN the example below, “CITY” is the filed, “STATION” is the Table.
- (SELECT CITY, LENGTH(CITY)
- FROM STATION.
- ORDER BY LENGTH(CITY) ASC, CITY ASC LIMIT 1)
- UNION.
- (SELECT CITY, LENGTH(CITY)
- FROM STATION.
- ORDER BY.

## How do you do not in SQL?

Overview. The SQL Server NOT IN operator is used **to replace a group of arguments using** the <> (or !=) operator that are combined with an AND. It can make code easier to read and understand for SELECT, UPDATE or DELETE SQL commands.

## How do I count the number of rows in SQL?

**The COUNT() function returns the number of rows that matches a specified criteria.**

- SQL COUNT(column_name) Syntax. The COUNT(column_name) function returns the number of values (NULL values will not be counted) of the specified column: …
- SQL COUNT(*) Syntax. …
- SQL COUNT(DISTINCT column_name) Syntax.

## How do I find the difference between two columns in SQL?

To calculate the difference between two dates in different columns, we **use the two columns createdDate and LastLogin of the registration table and apply the DATEDIFF function** on these columns. To find the difference between the two dates in different columns, we need two dates from the different columns.