Frequent question: Can you store a list in SQL?

Can SQL store a list?

SQL is designed to store your sets for you, not to provide you with a “bucket” for you to store a set yourself. Yes, it’s possible to do.

Are there lists in SQL?

There is an accompanying article, Arrays and Lists in SQL Server, The Long Version, which includes many more ways to crack lists in to tables – and you could argue too many.

How do I create a list 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.

Can we store a list in MySQL database?

There is no specific data type in mysql designed to store specifically lists. Other approach is to implode the list and store each member in a different row, then when queried, you can recreate the list, or array or JSON, in your preferred language.

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Can SQL return a list?

Starting with SQL Server 2017, you can now make your query results appear as a list. This means you can have your result set appear as a comma-separated list, a space-separated list, or whatever separator you choose to use.

How do I store a list of IDs in SQL?

2 Answers

  1. Store the IDs as CSV string ( 3,4,17 ) and use some sort of string split later.
  2. Store the IDs as XML in an XML typed column (support goes down to SQL Server 2005) like <IDs><ID>3</ID><ID>4</ID><ID>17</ID></IDs>
  3. Store the JSON you have just as the string it is into a NVARCHAR(MAX) column.

How do I get a list of databases in SQL Server?

Use SQL Server Management Studio

  1. In Object Explorer, connect to an instance of the SQL Server Database Engine, and then expand that instance.
  2. To see a list of all databases on the instance, expand Databases.

How do I store a list of values in one column in SQL?

First, you can make the column type XML, in which you can just store the values as XML. Second, you can make the column VARCHAR(max) or NVARCHAR(max) and store the values in a delimited fashion, such as by commas.

How do I add a list to a database?

To insert a row into a table, you follow these steps:

  1. Establish a database connection to get a Connection object.
  2. Create a Statement object from the Connection object.
  3. Execute the INSERT statement.
  4. Close the database connection.

How do I store a list of values in a SQL variable?

You are right, there is no datatype in SQL-Server which can hold a list of integers. But what you can do is store a list of integers as a string. DECLARE @listOfIDs varchar(8000); SET @listOfIDs = ‘1,2,3,4’; You can then split the string into separate integer values and put them into a table.

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How do I create a list in SQL Server?

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 list data in SQL?

The SQL SELECT Statement

  1. SELECT column1, column2, … FROM table_name;
  2. SELECT * FROM table_name;
  3. Example. SELECT CustomerName, City FROM Customers;
  4. Example. SELECT * FROM Customers;

Can I store an array in MySQL?

Although an array is one of the most common data types in the world of programming, MySQL actually doesn’t support saving an array type directly. You can’t create a table column of array type in MySQL. The easiest way store array type data in MySQL is to use the JSON data type.

Can MySQL store JSON?

MySQL supports a native JSON data type defined by RFC 7159 that enables efficient access to data in JSON (JavaScript Object Notation) documents. The JSON data type provides these advantages over storing JSON-format strings in a string column: Automatic validation of JSON documents stored in JSON columns.

What are the MySQL data types?

In MySQL there are three main data types: string, numeric, and date and time.