Can we apply distinct to a select query with multiple columns?

Answer. Yes, the DISTINCT clause can be applied to any valid SELECT query. It is important to note that DISTINCT will filter out all rows that are not unique in terms of all selected columns.

How do I find a specific pattern in a column in SQL?

SQL pattern matching allows you to search for patterns in data if you don’t know the exact word or phrase you are seeking. This kind of SQL query uses wildcard characters to match a pattern, rather than specifying it exactly. For example, you can use the wildcard “C\%” to match any string beginning with a capital C.

How do I select multiple column values into a single 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.

How do I SELECT multiple values in SQL?

The IN operator allows you to specify multiple values in a WHERE clause. The IN operator is a shorthand for multiple OR conditions.

How do you check if a value is in multiple columns?

Example using VLOOKUP

1. Select cell C2 by clicking on it.
2. Insert the formula in “=IF(ISERROR(VLOOKUP(A2,$B$2:$B$1001,1,FALSE)),FALSE,TRUE)” the formula bar.
3. Press Enter to assign the formula to C2.
4. Drag the formula down to the other cells in column C clicking and dragging the little “+” icon on the bottom-right of C2.

How do I select distinct on all columns?

The DISTINCT keyword is applied to all columns. It means that the query will use the combination of values in all columns to evaluate the distinction. If you want to select distinct values of some columns in the select list, you should use the GROUP BY clause.

How do I select multiple columns in SQL?

To select multiple columns from a table, simply separate the column names with commas! For example, this query selects two columns, name and birthdate , from the people table: SELECT name, birthdate FROM people; Sometimes, you may want to select all columns from a table.

How is pattern matching done in SQL?

SQL has a standard pattern matching technique using the ‘LIKE’ operator. But, it also supports the regular expression pattern matching for better functionality. Generally, the REGEXP_LIKE(column_name, ‘regex’) function is used for pattern matching in SQL.

How do I SELECT multiple columns in SQL?

How do I SELECT multiple columns as single column in SQL?

The + operator should do the trick just fine. Keep something in mind though, if one of the columns is null or does not have any value, it will give you a NULL result. Instead, combine + with the function COALESCE and you’ll be set.