How do you loop through a record in a table in SQL?

02/10/202202/10/2022 | Sarah HendricksonSarah Hendrickson | 0 Comment | 12:00 am

How do you loop through a record in a table in SQL?

Here is the SQL statement:

  1. CREATE TABLE CursorTest ( CursorTestID INT IDENTITY(1,1) PRIMARY KEY CLUSTERED, Filler VARCHAR(4000), RunningTotal BIGINT ) GO.
  2. INSERT INTO dbo.
  3. CREATE TABLE #TallyTable ( Iterator INT IDENTITY(1, 1), ProductID INT ); INSERT INTO #TallyTable ( ProductID ) SELECT ProductID FROM dbo.

How do you loop through a select result in SQL?

Linked

  1. -1. How to do loop in stored procedure for each row return by select statement.
  2. How to split string and insert values into table in SQL Server.
  3. SQL Simulating a foreach.
  4. Create a SQL query based on SELECT results.
  5. -3.
  6. SSMS “SELECT * INTO” from MSSQL Table to a Linked MySQL Server.

How do I iterate through a list in SQL Server?

Solution

  1. Use DATABASENAME.
  2. GO.
  3. DECLARE @PRODUCTDETAILSTABLE table (PRODUCTNAME nvarchar(100), PRODUCTID int, PRODUCTCOST int)
  4. — Declare your array table variable.
  5. DECLARE @MYARRAY table (TEMPCOL nvarchar(50), ARRAYINDEX int identity(1,1) )

How do you run a loop in SQL?

Loops in SQL Server

  1. Example: WHILE Loop. DECLARE @i INT = 10; WHILE @i <= 30 BEGIN PRINT (@i); SET @i = @i + 10; END;
  2. Example: WHILE with BREAK. DECLARE @i INT = 10; WHILE @i <= 30 BEGIN PRINT (@i); SET @i = @i + 10; IF @i = 30 BREAK; END;
  3. Example: WHILE with CONTINUE.
  4. Example: Nested Loop.

Can we use for loop in SQL query?

In SQL Server, there is no FOR LOOP. However, you simulate the FOR LOOP using the WHILE LOOP.

How do I iterate through a cursor in SQL?

Normally, when we need data looping, we use either “Cursors” or “While loop” in SQL Server. Both are used with multiple rows to give decisions on a row-by-row basis. Cursors – Cursor is a database object used by applications to manipulate the data in a set on a row-by-row basis.

Is looping possible in SQL?

Can we use loop in select statement in SQL?

The for-loop-name can be used to qualify the column names in the result set as returned by the select-statement. The cursor-name simply names the cursor that is used to select the rows from the result set.

How do I iterate over a list?

There are 7 ways you can iterate through List.

  1. Simple For loop.
  2. Enhanced For loop.
  3. Iterator.
  4. ListIterator.
  5. While loop.
  6. Iterable.forEach() util.
  7. Stream.forEach() util.

Can we use array in SQL query?

Conclusion. As you can see, SQL Server does not include arrays. But we can use table variables, temporary tables or the STRING_SPLIT function. However, the STRING_SPLIT function is new and can be used only on SQL Server 2016 or later versions.

Can we write loops in SQL?

In programming, a loop allows you to write a set of code that will run repeatedly within the same program. Many programming languages have several different types of loop to choose from, but in SQL Server there is only one: the WHILE loop.

How do you loop a stored procedure in SQL?

SQL While loop syntax

The while loop in SQL begins with the WHILE keyword followed by the condition which returns a Boolean value i.e. True or False. The body of the while loop keeps executing unless the condition returns false. The body of a while loop in SQL starts with a BEGIN block and ends with an END block.

How many types of loops are there in SQL Server?

Almost all programming languages implement them, and we’ll usually meet these 3 types of loops: WHILE – While the loop condition is true, we’ll execute the code inside that loop. DO … WHILE – Works in the same manner as the WHILE loop, but the loop condition is tested at the end of the loop.

Which is faster cursor or loop?

While SQL While loop is quicker than a cursor, reason found that cursor is defined by DECLARE CURSOR. Every emphasis of the loop will be executed inside system memory and consuming required server assets.

What is difference between cursor and WHILE loop?

Cursors in sql server allow you to fetch a set of data, loop through each record, and modify the values as necessary; then, you can easily assign these values to variables and perform processing on these values. While loop also same as cursor to fetch set of data and process each row in sql server.

What is the alternative FOR WHILE loop in SQL Server?

The Common Table Expressions started in SQL Server 2005 and they can be used to replace cursors or the while loop. It is also used for recursive queries and to reference the result table multiple times. As you can see, CTEs is an alternative in many situations to replace the WHILE loop.

What is Dynamic SQL example?

For example, dynamic SQL lets you create a procedure that operates on a table whose name is not known until runtime. In past releases of Oracle, the only way to implement dynamic SQL in a PL/SQL application was by using the DBMS_SQL package.

What are the two ways to iterate the elements of a collection?

There are three common ways to iterate through a Collection in Java using either while(), for() or for-each(). While each technique will produce more or less the same results, the for-each construct is the most elegant and easy to read and write.

What are the ways of traversing a list explain with an example for each?

Here are the methods which one can refer to for traversing lists in Python:

  • Python range () method.
  • List Comprehension.
  • Python enumerate () method.
  • Lambda function.
  • Python NumPy module.
  • By using a for Loop.
  • By using a while Loop.

Can SQL variable hold multiple values?

@cdistler​ SQL variable is to store a single value. So if you want to store multiple value, then you will need to define multiple variables.

How do I get nested data in SQL?

How to extract values from a nested JSON field in SQL

  1. Postgres. Use the ->> operator to extract a value as text, and the -> to extract a JSON object: select my_json_field ->> ‘userId’, my_json_field -> ‘transaction’ ->> ‘id’, my_json_field -> ‘transaction’ ->> ‘sku’ from my_table;
  2. Redshift.
  3. MySQL.

How do you write a for loop in SQL Server?

I am detailing answer on ways to achieve different types of loops in SQL server.

  1. FOR Loop. DECLARE @cnt INT = 0; WHILE @cnt < 10 BEGIN PRINT ‘Inside FOR LOOP’; SET @cnt = @cnt + 1; END; PRINT ‘Done FOR LOOP’;
  2. DO.. WHILE Loop.
  3. REPEAT..UNTIL Loop.

Can you do a loop in SQL?

Can we use looping in stored procedure?

The LOOP statement allows you to execute one or more statements repeatedly. The LOOP can have optional labels at the beginning and end of the block. The LOOP executes the statement_list repeatedly. The statement_list may have one or more statements, each terminated by a semicolon (;) statement delimiter.

What are 3 types of loops in SQL?

Types of PL/SQL Loops

  • Basic Loop / Exit Loop.
  • While Loop.
  • For Loop.
  • Cursor For Loop.

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