- How do I get random rows in SQL?
- How do you find top 5 salary in SQL?
- How do I get just the first row in SQL?
- How do I have multiple rows in one row in SQL?
- How do I get the last row in SQL?
- How do I select top 1000 rows in SQL?
- How can I get top 3 salary in SQL?
- How do I get only 5 records in SQL?
- How do I get last 5 rows in SQL?
- How do I select the last 3 rows in SQL?
- How can I get top 2 salary in SQL?
- How can I get maximum salary in each department?
- Is Newid random?
- How do I skip the first 10 rows in SQL?
- How do you delete random rows in SQL?
- How do I select specific rows in SQL?
- How do I get only 10 rows in SQL?
- How do you do random sampling in SQL?
How do I get random rows in SQL?
MySQL select random records using ORDER BY RAND()The function RAND() generates a random value for each row in the table.The ORDER BY clause sorts all rows in the table by the random number generated by the RAND() function.The LIMIT clause picks the first row in the result set sorted randomly..
How do you find top 5 salary in SQL?
Say Employe table contains emp_id, salary, rank, dept_id as columns and has some data in it.To get max salary from Employee table. SELECT MAX(salary) FROM employee;To get max salary from Employee table with respect to dept. … To get top 5 salary. … To get top 5 salary with respect to dept. … To get 2nd max salary.
How do I get just the first row in SQL?
4 Ways to Join Only The First Row in SQLUse Correlated Subqueries when the foreign key is indexed.Use a Complete Subquery when you don’t have indexes.Use Nested Subqueries if you have an ordered ID column.Use Nested Subqueries if you have an ordered ID column.Use Window Functions if you need more control.
How do I have multiple rows in one row in SQL?
Here is the example.Create a database.Create 2 tables as in the following.Execute this SQL Query to get the student courseIds separated by a comma. USE StudentCourseDB. SELECT StudentID, CourseIDs=STUFF. ( ( SELECT DISTINCT ‘, ‘ + CAST(CourseID AS VARCHAR(MAX)) FROM StudentCourses t2. WHERE t2.StudentID = t1.StudentID.
How do I get the last row in SQL?
To select the last row, we can use ORDER BY clause with desc (descending) property and Limit 1. Let us first create a table and insert some records with the help of insert command. The query is as follows. After creating the above table, we will insert records with the help of insert command.
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 can I get top 3 salary in SQL?
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 I get only 5 records in SQL?
MySQL supports the LIMIT clause to select a limited number of records, while Oracle uses ROWNUM.SQL Server / MS Access Syntax: SELECT TOP number|percent column_name(s) FROM table_name. WHERE condition;MySQL Syntax: SELECT column_name(s) FROM table_name. … Oracle Syntax: SELECT column_name(s) FROM table_name.
How do I get last 5 rows in SQL?
You need to count number of rows inside table ( say we have 12 rows )then subtract 5 rows from them ( we are now in 7 )select * where index_column > 7 select * from users where user_id > ( (select COUNT(*) from users) – 5) you can order them ASC or DESC.
How do I select the last 3 rows in SQL?
SELECT * FROM (select * from suppliers ORDER BY supplier_name DESC) suppliers2 WHERE rownum <= 3 ORDER BY rownum DESC; Notice that although you want the last 3 records sorted by supplier_name in ascending order, you actually sort the supplier_name in descending order in this solution.
How can I get top 2 salary in SQL?
IN SQL Server using Common Table Expression or CTE, we can find the second highest salary: WITH T AS ( SELECT * DENSE_RANK() OVER (ORDER BY Salary Desc) AS Rnk FROM Employees ) SELECT Name FROM T WHERE Rnk=2; How to find the third largest salary?
How can I get maximum salary in each department?
You can use : SELECT DepatID, a , b, c FROM EmpDetails WHERE Salary IN ( SELECT max(Salary) FROM EmpDetails GROUP BY DeptID ); if you will use the previous query it will only reflects the records of the min val except the salary as you have used the max function.
Is Newid random?
The key here is the NEWID function, which generates a globally unique identifier (GUID) in memory for each row. By definition, the GUID is unique and fairly random; so, when you sort by that GUID with the ORDER BY clause, you get a random ordering of the rows in the table.
How do I skip the first 10 rows in SQL?
In order to do this in SQL Server, you must order the query by a column, so you can specify the rows you want. Do you want something like in LINQ skip 5 and take 10? SELECT TOP(10) * FROM MY_TABLE WHERE ID not in (SELECT TOP(5) ID From My_TABLE); This approach will work in any SQL version.
How do you delete random rows in SQL?
First, you specify the name of the table from which the rows are to be deleted in the FROM clause. For example, the following statement will delete all rows from the target_table : DELETE FROM target_table; Second, to specify the number or percent of random rows that will be deleted, you use the TOP clause.
How do I select specific rows 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 get only 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 you do random sampling in SQL?
Random Sampling Within Groups using SQLCreate a random row number for each user_id that resets for each of my periods or groups. We do that by ordering the row_number() function using the random() function. … Select N of those rows filtering on our new random row number.