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When to use the ORDER BY clause in SQL?
The SQL ORDER BY clause is used to sort the data in ascending or descending order, based on one or more columns.
What do the names of the columns in the ORDER BY clause mean?
The column names referenced in the ORDER BY clause must correspond to either a column or column alias in the select list or to a column defined in a table specified in the FROM clause without any ambiguities.
Is there limit to number of columns in order by clause?
There is no limit to the number of columns in the ORDER BY clause; however, the total size of the columns specified in an ORDER BY clause cannot exceed 8,060 bytes. Columns of type ntext, text, image, geography, geometry, and xml cannot be used in an ORDER BY clause.
Can you guarantee the Order of rows in a result set?
The order in which rows are returned in a result set are not guaranteed unless an ORDER BY clause is specified. Determine the order in which ranking function values are applied to the result set. ORDER BY is not supported in SELECT/INTO or CREATE TABLE AS SELECT (CTAS) statements in Azure Synapse Analytics or Parallel Data Warehouse.
To specify exactly the order of rows in the result set, you add use an ORDER BY clause in the SELECT statement as follows: column2 DESC; In this syntax, the ORDER BY clause appears after the FROM clause. In case the SELECT statement contains a WHERE clause, the ORDER BY clause must appear after the WHERE clause.
How to sort column name in order by clause?
In previous examples, we specified the column name in Order by clause to sort results in ascending or descending order. We can also specify column position in Order by clause. In this query, column birthdate is at the 3rd position; therefore, we can use three in the Order by clause to sort results on this column data.
How to specify the Order of rows in a table?
To specify exactly the order of rows in the result set, you add use an ORDER BY clause in the SELECT statement as follows: SELECT column1, column2 FROM table_name ORDER BY column1 ASC , column2 DESC; In this syntax, the ORDER BY clause appears after the FROM clause. In case the SELECT statement contains a WHERE clause,
When to use 3 in order by clause?
In this query, column birthdate is at the 3rd position; therefore, we can use three in the Order by clause to sort results on this column data. Note: I would not recommend using column position in Order By clause.