How do you iterate over a list in SQL?

How do I iterate over a list in SQL?


  2. GO.
  4. — Declare your array table variable.
  5. DECLARE @MYARRAY table (TEMPCOL nvarchar(50), ARRAYINDEX int identity(1,1) )

How do you iterate over 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 iterate in SQL query?

As you can see, in each iteration of the loop, the defined condition is checked, and then, according to the result of the condition, the code flow is determined. If the result of the condition is true, the SQL statement will be executed. Otherwise, the code flow will exit the loop.

Is there a for loop in SQL?

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

IMPORTANT:  Frequent question: Is Golang similar to PHP?

How do I make a list of values in SQL?

You can create lists of SQL Query or Fixed Data values . In the Data Model components pane, click List of Values and then click Create new List of Values. Enter a Name for the list and select a Type.

How do I create a list of strings in SQL?

DECLARE @list NVARCHAR(MAX) SET @list = ‘1,2,5,7,10’; DECLARE @pos INT DECLARE @nextpos INT DECLARE @valuelen INT DECLARE @tbl TABLE (number int NOT NULL) SELECT @pos = 0, @nextpos = 1; WHILE @nextpos > 0 BEGIN SELECT @nextpos = charindex(‘,’, @list, @pos + 1) SELECT @valuelen = CASE WHEN @nextpos > 0 THEN @nextpos …

How do I iterate through a stored procedure?

It’s very easy to loop through the rows in SQL procedure. You just need to use a cursor. Here is an example: Let us consider a table Employee with column NAME and AGE with 50 records into it and you have to execute a stored procedure say TESTPROC which will take name and age parameters of each row.

Which SQL command is used to iterate through each row in a cursor?

For more information on cursors, also take a look at the free SQL query training provided by Steve Stedman. In SQL Server the cursor is a tool that is used to iterate over a result set, or to loop through each row of a result set one row at a time.

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. … If an ORDER BY clause follows ROWNUM in the same query, then the rows will be reordered by the ORDER BY clause.

IMPORTANT:  What is default character set in Java?

How do I split a string in SQL?

Split comma-separated value string in a column. SELECT ProductId, Name, value FROM Product CROSS APPLY STRING_SPLIT(Tags, ‘,’); Here is the result set. The order of the output may vary as the order is not guaranteed to match the order of the substrings in the input string.

How do you concatenate in SQL?

SQL Server CONCAT() Function

  1. Add two strings together: SELECT CONCAT(‘W3Schools’, ‘.com’);
  2. Add 3 strings together: SELECT CONCAT(‘SQL’, ‘ is’, ‘ fun!’ );
  3. Add strings together (separate each string with a space character): SELECT CONCAT(‘SQL’, ‘ ‘, ‘is’, ‘ ‘, ‘fun!’ );

How do you create an array in SQL query?

Define arrays as SQL variables. Use the ARRAY_AGG built-in function in a cursor declaration, to assign the rows of a single-column result table to elements of an array. Use the cursor to retrieve the array into an SQL out parameter. Use an array constructor to initialize an array.

Code Academy