Technology & Computing

By: Jeff Cutler-stammUpdated: February 20, 2021

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- Questions94,481
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- Last UpdatedOctober 01, 2022

- The most efficient (using over()). select Grade, count(*) * 100.0 / sum(count(*)) over() from MyTable group by Grade.
- Universal (any SQL version). select Grade, count(*) * 100.0 / (select count(*) from MyTable) from MyTable group by Grade;
- With CTE, the least efficient.

In this regard, how do you take a percentage?

- Convert the problem to an equation using the percentage formula: P% * X = Y.
- P is 10%, X is 150, so the equation is 10% * 150 = Y.
- Convert 10% to a decimal by removing the percent sign and dividing by 100: 10/100 = 0.10.

Also Know, do calculations in SQL?

What is the wildcard character in a SQL query?

To broaden the selections of a structured **query** language (**SQL**-SELECT) statement, two **wildcard characters**, the percent sign (%) and the underscore (_), can be used. The percent sign is analogous to the asterisk (*) **wildcard character** used with MS-DOS.

How do you calculate percent discount in SQL query?

To **calculate** the final price of an item after multiple **discounts**, just do something like this: Final Price = (Orig Price)(1 - d1)(1 - d2)(1 - d3) etc etc where d1, d2 are **discount percentages** as decimals (eg, 0.15 for 15%).

The **SQL** WHERE clause is used to specify a condition while fetching the data from a single table or by joining with multiple tables. If the given condition is satisfied, then only it returns a specific value from the table. You should use the WHERE clause to filter the records and fetching only the necessary records.

If you want to know what **percent** A is of B, you simple divide A by B, then take that **number** and move the decimal place **two** spaces to the right. That's your **percentage**! To use the **calculator**, enter **two numbers** to **calculate** the **percentage** the first is of the second by clicking **Calculate Percentage**.

If your **calculator** has a **percentage** button, the **calculation** is as follows: 40 x 25% = 10. If your **calculator** does not have a **percentage** button, you must first divide the **percentage** by 100: 25 ÷ 100 = 0.25. You can then multiply this answer by the whole to **determine** the part: 0.25 x 40 = 10.

- First: work out the difference (increase) between the two numbers you are comparing.
- Increase = New Number - Original Number.
- Then: divide the increase by the original number and multiply the answer by 100.
- % increase = Increase ÷ Original Number × 100.

The mean is the **average** of the numbers. It is easy to **calculate**: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.

- COUNT() Syntax. SELECT COUNT(column_name) FROM table_name. WHERE condition;
- AVG() Syntax. SELECT AVG(column_name) FROM table_name. WHERE condition;
- SUM() Syntax. SELECT SUM(column_name) FROM table_name. WHERE condition;

Field **calculations can** be performed in a **database** by adding a formula field. Field **calculations** allow you to **perform** addition, subtraction, multiplication, and division operations on any numeric fields in your **database**. Operations **can** also be grouped using parentheses (ie.

- Open the table by double-clicking it in the Navigation Pane.
- Scroll horizontally to the rightmost column in the table, and click the Click to Add column heading.
- In the list that appears, click Calculated Field, and then click the data type that you want for the result.

Excels **SUMIF in SQL**

The the group by and over clauses specify the rows. The column is explicitly used in the <condition> that is put into the case expression. The case expression accepts different values in the when and then branches. This allows you to The **SQL divide** ( / ) operator is used to **divide one** expressions or numbers by another.

The IS **NULL** condition is used in **SQL** to test for a **NULL** value. It returns TRUE if a **NULL** value is found, otherwise it returns FALSE. It can be used in a SELECT, INSERT, UPDATE, or DELETE statement.

A **SQL JOIN** combines records from two tables. A **JOIN** locates related column values in the two tables.

**The SQL JOIN syntax**

- SELECT column-names.
- FROM table-name1 JOIN table-name2.
- ON column-name1 = column-name2.
- WHERE condition.

- Hi, friends GST is now start in INDIA.
- The basic calculation is Amount Excluding GST = (100*MRP (With GST))/ (100+GST (%))
- For Example MRP Rate = 105 (N.B. MRP is include with GST)
- That price has included GST 5%.
- Amount Excluding GST = (100 * 105) / (100 + 5)
- That will give Amount Excluding GST = 100 Rs.

- AVG() - Returns the average value.
- COUNT() - Returns the number of rows.
- FIRST() - Returns the first value.
- LAST() - Returns the last value.
- MAX() - Returns the largest value.
- MIN() - Returns the smallest value.
- SUM() - Returns the sum.