How do I concatenate 3 strings in SQL?

How do I concatenate a string in a column in SQL?

To append a string to another and return one result, use the || operator. This adds two strings from the left and right together and returns one result. If you use the name of the column, don’t enclose it in quotes. However, in using a string value as a space or text, enclose it in quotes.

Can you concatenate fields in SQL?

Overview of SQL Server CONCAT() function

The CONCAT() takes two up to 255 input strings and joins them into one. It requires at least two input strings. If you pass one input string, the CONCAT() function will raise an error.

How do I group concatenate strings in SQL?

The GROUP_CONCAT() function in MySQL is used to concatenate data from multiple rows into one field. This is an aggregate (GROUP BY) function which returns a String value, if the group contains at least one non-NULL value.


dept_id employees ids
2 1, 2
3 3, 4

How do I have multiple rows in one row in SQL?

STUFF Function in SQL Server

  1. Create a database.
  2. Create 2 tables as in the following.
  3. 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.
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How do I join 3 columns in SQL?

Joining 3 Tables Using a Junction Table

  1. The first step is to look at the schema and select the columns we want to show. …
  2. The next step is to determine which tables will be necessary for the query. …
  3. In the final part, we’ll have to join all the tables together.

How can I merge two tables in SQL query?

Key learnings

  1. use the keyword UNION to stack datasets without duplicate values.
  2. use the keyword UNION ALL to stack datasets with duplicate values.
  3. use the keyword INNER JOIN to join two tables together and only get the overlapping values.

What does || mean in Oracle?

|| operator concatenates one or more strings into a single string in Oracle. Quick Example: — Concatenate strings ‘New ‘ and ‘York’ SELECT ‘New ‘ || ‘York’ FROM dual; — Result: New York.

How do you use concatenate?

There are two ways to do this:

  1. Add double quotation marks with a space between them ” “. For example: =CONCATENATE(“Hello”, ” “, “World!”).
  2. Add a space after the Text argument. For example: =CONCATENATE(“Hello “, “World!”). The string “Hello ” has an extra space added.

How do you concatenate null values in SQL?

One way to concatenate multiple strings or columns is to use the “+” operator. For the rows where MiddleName is NULL, the concatenation result will be NULL.

How do you concatenate a snowflake?

Snowflake Concat Operator (||)

The concatenation operator concatenates two strings on either side of the || symbol and returns the concatenated string. The || operator provides alternative syntax for CONCAT and requires at least two arguments.

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What is Group_concat_max_len?

The maximum value for group_concat_max_len is 18446744073709551615. The group-concat string does not end with “…” If you try to group too much text, it just gets truncated. So I wonder if the problem is not with MySQL’s settings, but with the display of your cells.


STRING_AGG is an aggregate function that takes all expressions from rows and concatenates them into a single string. Expression values are implicitly converted to string types and then concatenated.

How do I concatenate in MySQL?

CONCAT() function in MySQL is used to concatenating the given arguments. It may have one or more arguments. If all arguments are nonbinary strings, the result is a nonbinary string. If the arguments include any binary strings, the result is a binary string.