Users questions 

What does top 100 percent do in SQL Server?

Joe Ford

What does top 100 percent do in SQL Server?

TOP (100) PERCENT is completely meaningless in recent versions of SQL Server, and it (along with the corresponding ORDER BY, in the case of a view definition or derived table) is ignored by the query processor. You’re correct that once upon a time, it could be used as a trick, but even then it wasn’t reliable.

How do I select top 1000 rows in SQL?

In order to SELECT or EDIT all tables open SSMS, under Tools, click Options as shown in tha image below: Then expand SQL Server Object Explorer, and select Command: Then change those 200 and 1000 values to 0 for both options.

How do I find the top 5 values in SQL?

SQL SELECT TOP Clause

  1. SQL Server / MS Access Syntax. SELECT TOP number|percent column_name(s) FROM table_name;
  2. MySQL Syntax. SELECT column_name(s) FROM table_name. LIMIT number;
  3. Example. SELECT * FROM Persons. LIMIT 5;
  4. Oracle Syntax. SELECT column_name(s) FROM table_name. WHERE ROWNUM <= number;
  5. Example. SELECT * FROM Persons.

How do I select top 20 records in SQL?

MySQL supports the LIMIT clause to select a limited number of records, while Oracle uses FETCH FIRST n ROWS ONLY and ROWNUM .

  1. SQL Server / MS Access Syntax: SELECT TOP number|percent column_name(s)
  2. MySQL Syntax: SELECT column_name(s)
  3. Oracle 12 Syntax:
  4. Older Oracle Syntax:
  5. Older Oracle Syntax (with ORDER BY):

How can I get top 3 salary in SQL?

Here is a way to do this task using dense_rank() function. Query : select * from( select ename, sal, dense_rank() over(order by sal desc)r from Employee) where r=&n To find to the 2nd highest sal set n = 2 To find 3rd highest sal set n = 3 and so on.

How do you find top 10 salary in SQL?

TO FIND NTH HIGHEST SALARY USING CTE

  1. SELECT*FROM [DBO].[EMPLOYEE] ORDER BY SALARY DESC.
  2. GO.
  3. WITH RESULT AS.
  4. (
  5. SELECT SALARY,
  6. DENSE_RANK() OVER (ORDER BY SALARY DESC) AS DENSERANK.
  7. FROM EMPLOYEE.
  8. )

Where is salary maximum salary?

SELECT name, MAX(salary) AS salary FROM employee WHERE salary IN (SELECT salary FROM employee MINUS SELECT MAX(salary) FROM employee);

How can I get maximum salary in each department?

if use salary in (select max(salary…)) The below listed query will list highest salary in each department. select deptname, max(salary) from department, employee where department.

How can I get second highest salary?

SELECT MAX(salary) FROM Employee WHERE Salary NOT IN ( SELECT Max(Salary) FROM Employee); This will return 200 in our case. SELECT MAX(Salary) From Employee WHERE Salary < ( SELECT Max(Salary) FROM Employee); You can use this SQL query if Interviewer ask you to get second highest salary in MySQL without using LIMIT.

Where is MongoDB second highest salary?

$max operator in MongoDB – Find maximum value from documents

  1. Find maximum salary of all employee with same firstName where salary > 2000 in collection in MongoDB >
  2. Step 4.1 – We will find document where salary > 2000.
  3. Step 4.2 – We will use $match operator.

How do you find the top 1 salary in SQL?

By default ORDER BY clause print rows in ascending order, since we need the highest salary at the top, we have used ORDER BY DESC, which will display salaries in descending order. Again DISTINCT is used to remove duplicates. The outer query will then pick the topmost salary, which would be your Nth highest salary.

How do you get 3 max salary?

The inner query tries to find a distinct sal value that is less than or equal to the records in emp table b. The count is 3, because 50 , 200 , 150 are less than 300 . Since 3 >= 3 (inner query result) the answer is true and 300 is selected. Now the outer loop counter comes to 2nd row i.e 2, 50 .

What is top SQL?

Advertisements. The SQL TOP clause is used to fetch a TOP N number or X percent records from a table. Note − All the databases do not support the TOP clause. For example MySQL supports the LIMIT clause to fetch limited number of records while Oracle uses the ROWNUM command to fetch a limited number of records.

What is SQL limit?

The SQL LIMIT clause constrains the number of rows returned by a SELECT statement. For Microsoft databases like SQL Server or MSAccess, you can use the SELECT TOP statement to limit your results, which is Microsoft’s proprietary equivalent to the SELECT LIMIT statement.

How do you get top 3 salaries for each department from the employee table?

Here’s the answer I came up with. SELECT dpt.Name AS Department, e1.Name AS Employee, e1. Salary AS Salary FROM Employee AS e1 INNER JOIN Department dpt ON e1. DepartmentID = dpt.Id WHERE 3 > ( SELECT COUNT(DISTINCT Salary) FROM Employee AS e2 WHERE e2.

How do I get last 10 rows in SQL?

The following is the syntax to get the last 10 records from the table. Here, we have used LIMIT clause. SELECT * FROM ( SELECT * FROM yourTableName ORDER BY id DESC LIMIT 10 )Var1 ORDER BY id ASC; Let us now implement the above query.

Does limit make query faster?

The answer, in short, is yes. If you limit your result to 1, then even if you are “expecting” one result, the query will be faster because your database wont look through all your records. It will simply stop once it finds a record that matches your query.

How do I get the first 10 rows in SQL?

The ANSI SQL answer is FETCH FIRST . If you want ties to be included, do FETCH FIRST 10 ROWS WITH TIES instead. To skip a specified number of rows, use OFFSET , e.g. Will skip the first 20 rows, and then fetch 10 rows.

How do I select top 10 in SQL?

Example – Using TOP PERCENT keyword SELECT TOP(10) PERCENT contact_id, last_name, first_name FROM contacts WHERE last_name = ‘Anderson’ ORDER BY contact_id; This SQL SELECT TOP example would select the first 10% of the records from the full result set.

How do I select a top in mysql?

The SQL TOP clause is used to limit the number of rows returned. Its basic syntax is: SELECT TOP number | percent column_list FROM table_name ; Here, column_list is a comma separated list of column or field names of a database table (e.g. name, age, country, etc.)

How do I get the last row in SQL?

16 Answers. to get the last row of a SQL-Database use this sql string: SELECT * FROM TableName WHERE id=(SELECT max(id) FROM TableName);

How do I get just the first row in SQL?

4 Ways to Join Only The First Row in SQL

  1. Use Correlated Subqueries when the foreign key is indexed.
  2. Use a Complete Subquery when you don’t have indexes.
  3. Use Nested Subqueries if you have an ordered ID column.
  4. Use Nested Subqueries if you have an ordered ID column.
  5. Use Window Functions if you need more control.

What is cross join?

Introduction. The CROSS JOIN is used to generate a paired combination of each row of the first table with each row of the second table. This join type is also known as cartesian join. The main idea of the CROSS JOIN is that it returns the Cartesian product of the joined tables.

How do I get unique rows in SQL?

The SQL SELECT DISTINCT Statement The SELECT DISTINCT statement is used to return only distinct (different) values. Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values.

How do I select a row in SQL?

To select rows using selection symbols for character or graphic data, use the LIKE keyword in a WHERE clause, and the underscore and percent sign as selection symbols. You can create multiple row conditions, and use the AND, OR, or IN keywords to connect the conditions.

How do I select a SQL query?

SQL – SELECT Query

  1. SELECT * FROM table_name;
  2. SQL> SELECT ID, NAME, SALARY FROM CUSTOMERS;
  3. SQL> SELECT * FROM CUSTOMERS;

What is Row_Number () in SQL?

Introduction to SQL Server ROW_NUMBER() function The ROW_NUMBER() is a window function that assigns a sequential integer to each row within the partition of a result set. The row number starts with 1 for the first row in each partition.

How do I find a column in SQL?

Use this Query to search Tables & Views:

  1. SELECT COL_NAME AS ‘Column_Name’, TAB_NAME AS ‘Table_Name’
  2. FROM INFORMATION_SCHEMA.COLUMNS.
  3. WHERE COL_NAME LIKE ‘%MyName%’
  4. ORDER BY Table_Name, Column_Name;