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How do I fetch multiple records in SQL?

How do I fetch multiple records in SQL?

Now to get to your question, as others before me answered you can use the IN clause: SELECT * FROM users WHERE ( id IN (1,2,..,n) ); or, if you wish to limit to a list of records between id 20 and id 40, then you can easily write: SELECT * FROM users WHERE ( ( id >= 20 ) AND ( id <= 40 ) );

How do I select the same row multiple times in SQL?

If I get your meaning then a very simple way is to cross join on a derived query on a table with more than 1000 rows in it and put a top 1000 on that. This would duplicate your results 1000 times.

How do you find duplicate records in SQL based on combination of fields?

Find duplicate values in one column

  1. First, use the GROUP BY clause to group all rows by the target column, which is the column that you want to check duplicate.
  2. Then, use the COUNT() function in the HAVING clause to check if any group have more than 1 element. These groups are duplicate.

How do you check if there are duplicate rows in SQL?

How to Find Duplicate Values in SQL

  1. Using the GROUP BY clause to group all rows by the target column(s) – i.e. the column(s) you want to check for duplicate values on.
  2. Using the COUNT function in the HAVING clause to check if any of the groups have more than 1 entry; those would be the duplicate values.

How do I remove duplicates in select query?

The go to solution for removing duplicate rows from your result sets is to include the distinct keyword in your select statement. It tells the query engine to remove duplicates to produce a result set in which every row is unique. The group by clause can also be used to remove duplicates.

What is difference between unique and distinct?

The main difference between unique and distinct is that UNIQUE is a constraint that is used on the input of data and ensures data integrity. While DISTINCT keyword is used when we want to query our results or in other words, output the data.

How do I insert duplicate rows in SQL?

If you’re able to use MySQL Workbench, you can do this by right-clicking the row and selecting ‘Copy row’, and then right-clicking the empty row and selecting ‘Paste row’, and then changing the ID, and then clicking ‘Apply’.

Does inner join duplicate rows?

3 Answers. BNO-CSCcode contains duplicates. You are joining the first record of Things to both records of Mapp , then the second record of Things joins to both records of Mapp . If you want to join these together, you need some unique way of identifying the rows between the tables.

Why does inner join duplicate rows?

Inner Join Creates Duplicate Records

  • If the Product status is Pending (In ProdMaster)
  • User is allowed to view the product (In Allowed User – User code)
  • Show the product code / Product name without duplicate.

How many rows is a natural join?

1 Answer. You have at most 1000 rows from the natural join of R1 and R2 because there are two possible cases: either 1) all the values of R1. C are present in R2. C (i.e. R1.

What is the major drawback of natural join?

The common complaint about NATURAL JOIN is that since shared columns aren’t explicit, after a schema change inappropriate column pairing may occur.

What is a natural join?

A NATURAL JOIN is a JOIN operation that creates an implicit join clause for you based on the common columns in the two tables being joined. Common columns are columns that have the same name in both tables. A NATURAL JOIN can be an INNER join, a LEFT OUTER join, or a RIGHT OUTER join.

Does order matter in natural join?

NATURALJOIN is two words: NATURAL JOIN. The order of the tables makes no difference. Exception: when you SELECT * , then the list of selected columns is all columns of the first table, then all columns of the second table.

What is the difference between Equi join and natural join?

Equi Join is a join using one common column (referred to in the “on” clause). This join is a equally comparison join, thus not allowing other comparison operator such as <, > <= etc. Natural Join is an implicit join clause based on the common columns in the two tables being joined.

Which JOIN is like an inner join?

INNER JOIN TABLE2 When the Join condition is met, it returns matched rows in both tables with the selected columns in the SELECT clause. SQL Inner Join clause is the same as Join clause and works the same way if we don’t specify the type (INNER) while using the Join clause.

What is a cross join?

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.

Is inner join same as self join?

A SELF JOIN is simply any JOIN operation where you are relating a table to itself. The way you choose to JOIN that table to itself can use an INNER JOIN or an OUTER JOIN.

Why is self Join needed?

You use self-join to create a result set that joins the rows with the other rows within the same table. Because you cannot refer to the same table more than one in a query, you need to use a table alias to assign the table a different name when you use self-join.

How do I fetch multiple records in SQL?

How do I fetch multiple records in SQL?

Multiple row subquery returns one or more rows to the outer SQL statement….Multiple Row Subqueries

  1. Using IN operator with a Multiple Row Subquery.
  2. Using NOT IN operator with a Multiple Row Subquery.
  3. Using ANY with a Multiple Row Subquery.
  4. Multiple Column Subqueries.
  5. SQL subqueries using DISTINCT.

How do I select multiple records in MySQL?

To select multiple values, you can use where clause with OR and IN operator.

How do I pass multiple values in a single parameter in SQL?

Method 1 : Using XQuery In this solution, you need to pass a single comma delimiter string to the stored procedure. Once it is passed, you need to convert the string parameter to xml variable and split it using comma delimiter and then you can query it. Given below is the script.

How to get multiple query results in one table?

Just use a GROUP BY: select Category, sum(QTYINSTOCK * AVGPRICE) as Total from inventoryinfo WHERE Category IN (‘Albums’, ‘Prints’, ‘Frames’) GROUP BY Category Or if you want the results in multiple columns:

How does the receive statement in SQL Server work?

The RECEIVE statement reads messages from a queue and returns a result set. The result set consists of zero or more rows, each of which contains one message. If the INTO clause is not used, and column_specifier does not assign the values to local variables, the statement returns a result set to the calling program.

How to retrieve data from stored procedure which has multiple select statements?

Given a stored procedure in SQL Server which has multiple select statements, is there a way to work with those results separately while calling the procedure? In .NET, if I call this proc, I can use a SqlDataReader to move between the two result sets, so I can easily retrieve all people and cars.

Can you return more than one result set from one procedure?

No. If you want to work with a single result set from one procedure, then you can only be returning one result set. – Kermit Nov 19 ’13 at 21:56 Say you have a column called ‘type’ on both Car and Person table, the new table can’t have 2 columns named ‘type’.