- How do I count rows in SQL?
- What is mod in SQL?
- How do I select the last 3 rows in SQL?
- Where can I find maximum salary in department wise?
- How do I show only 10 rows in SQL?
- How do I get last 10 rows in SQL Server?
- How do I get only odd rows in SQL?
- How do I have multiple rows in one row in SQL?
- Is Rownum stored in database?
- What is offset in SQL query?
- How do I get top 5 rows in SQL?
- How do you delete duplicate rows in SQL?
- How do I get last 5 rows in SQL?
- How do I get only one row in SQL?
- How can I get first 100 rows in SQL?
- How do I select top 1000 rows in SQL?
- What is Rownum in SQL?
- How do I get the last row in SQL?
How do I count rows in SQL?
To counts all of the rows in a table, whether they contain NULL values or not, use COUNT(*).
That form of the COUNT() function basically returns the number of rows in a result set returned by a SELECT statement..
What is mod 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 I select the last 3 rows in SQL?
I want to select the last 3 rows of an sql table. I know I should use SELECT * FROM table ORDER BY DESC LIMIT 3 , but the problem with this code is that it selects the rows from the end. For example, it selects 30, then 29, then 28.
Where can I find maximum salary in department wise?
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.
How do I show only 10 rows in SQL?
To select first 10 elements from a database using SQL ORDER BY clause with LIMIT 10. Insert some records in the table using insert command. Display all records from the table using select statement. Here is the alternate query to select first 10 elements.
How do I get last 10 rows in SQL Server?
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.
How do I get only odd rows in SQL?
Selecting ODD or EVEN rows from a tableWrite 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 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.
Is Rownum stored in database?
Both, rownum and rowed are pseudo columns. For each row in the database, the ROWID pseudocolumn returns the address of the row. For each row returned by a query, the ROWNUM pseudocolumn returns a number indicating the order in which Oracle selects the row from a table or set of joined rows.
What is offset in SQL query?
OFFSET and FETCH are used to return a window of records from a result set. OFFSET specifies how many rows to skip within the result, and FETCH specifies how many rows from that point forward to return in the result. OFFSET and FETCH were recently introduced in SQL Server 2012 and are ANSI compliant.
How do I get top 5 rows in SQL?
SQL SELECT TOP ClauseSQL Server / MS Access Syntax. SELECT TOP number|percent column_name(s) FROM table_name;MySQL Syntax. SELECT column_name(s) FROM table_name. LIMIT number;Example. SELECT * FROM Persons. LIMIT 5;Oracle Syntax. SELECT column_name(s) FROM table_name. WHERE ROWNUM <= number;Example. SELECT * FROM Persons.
How do you delete duplicate rows in SQL?
RANK function to SQL delete duplicate rows We can use the SQL RANK function to remove the duplicate rows as well. SQL RANK function gives unique row ID for each row irrespective of the duplicate row. In the following query, we use a RANK function with the PARTITION BY clause.
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 get only one 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 can I get first 100 rows in SQL?
“sql query select first 100 rows” Code AnswerSyntax:SELECT TOP number|percent column_name(s)FROM table_name.WHERE condition;Example:SELECT TOP 3 * FROM Customers;
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.
What is Rownum in SQL?
For each row returned by a query, the ROWNUM pseudocolumn returns a number indicating the order in which Oracle selects the row from a table or set of joined rows. The first row selected has a ROWNUM of 1, the second has 2, and so on. … The results can vary depending on the way the rows are accessed.
How do I get the last row in SQL?
to get the last row of a SQL-Database use this sql string: SELECT * FROM TableName WHERE id=(SELECT max(id) FROM TableName); Output: Last Line of your db!