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On this page
  • Description
  • Sample Source Patterns
  • Common Case
  • TOP using PERCENT
  • TOP WITH TIES
  • Known Issues
  • Related EWIs
  1. Translation Reference
  2. SQLServer
  3. Queries

TOP

PreviousQueries

Last updated 1 year ago

Description

Some parts in the output code are omitted for clarity reasons.

Limits the rows returned in a query result set to a specified number of rows or percentage of rows. When you use TOP with the ORDER BY clause, the result set is limited to the first N number of ordered rows. Otherwise, TOP returns the first N number of rows in an undefined order. Use this clause to specify the number of rows returned from a SELECT statement. Or, use TOP to specify the rows affected by an INSERT, UPDATE, MERGE, or DELETE statement. ()

Syntax in SQL Server

TOP (expression) [PERCENT] [ WITH TIES ]

To get more information about the TOP arguments please check the .

Syntax in Snowflake

TOP <n> 

To get more information about TOP arguments please check the .

Sample Source Patterns

To execute correctly the following samples it is required run the next CREATE TABLE statement:

IN -> SqlServer_01.sql
CREATE TABLE Cars(
    Model VARCHAR(15), 
    Price MONEY, 
    Color VARCHAR(10)
);

INSERT Cars VALUES ('sedan', 10000, 'red'), 
('convertible', 15000, 'blue'),
('coupe', 20000, 'red'), 
('van', 8000, 'blue'),
('sub', 8000, 'green');
OUT -> SqlServer_01.sql
CREATE OR REPLACE TABLE Cars (
    Model VARCHAR(15),
    Price NUMBER(38, 4),
    Color VARCHAR(10)
)
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"transact"}}'
;

INSERT INTO Cars VALUES ('sedan', 10000, 'red'),
('convertible', 15000, 'blue'),
('coupe', 20000, 'red'),
('van', 8000, 'blue'),
('sub', 8000, 'green');

Common Case

SQL Server

IN -> SqlServer_02.sql
SELECT TOP(1) Model, Color, Price
FROM Cars
WHERE Color = 'red'
Model | Color | Price
--------------------------
sedan |  red  | 10000.0000

Snowflake

OUT -> SqlServer_02.sql
SELECT
TOP 1
Model,
Color,
Price
FROM
Cars
WHERE
Color = 'red';
MODEL	COLOR	PRICE
sedan	red	10,000

TOP using PERCENT

SQL Server

IN -> SqlServer_03.sql
SELECT TOP(50)PERCENT Model, Color, Price FROM Cars
Model        |  Color  |  Prices
-----------------------------------
sedan        |  red    |  10000.0000
convertible  |  blue   |  15000.0000
coupe        |  green  |  20000.0000

Snowflake

OUT -> SqlServer_03.sql
SELECT
TOP 50 !!!RESOLVE EWI!!! /*** SSC-EWI-0040 - THE STATEMENT IS NOT SUPPORTED IN SNOWFLAKE ***/!!!
Model,
Color,
Price
FROM
Cars;
MODEL	         COLOR        PRICE
sedan	         red          10,000
convertible      blue         15,000
coupe	         red          20,000
van	         blue         8,000
sub              green        8,000

Since PERCENT argument is not supported by Snowflake it is being removed from the TOP clause, that's why the result of executing the query in Snowflake is not equivalent to SQL Server.

TOP WITH TIES

SQL Server

IN -> SqlServer_04.sql
SELECT TOP(50)PERCENT WITH TIES Model, Color, Price FROM Cars ORDER BY Price;
Model  |  Color   | Price
-------------------------------
van    |  blue    | 8000.0000
sub    |  green   | 8000.0000
sedan  |  red     | 10000.0000

Snowflake

Out -> SqlServer_04.sql
SELECT
TOP 50 !!!RESOLVE EWI!!! /*** SSC-EWI-0040 - THE STATEMENT IS NOT SUPPORTED IN SNOWFLAKE ***/!!!
Model,
Color,
Price
FROM
Cars
ORDER BY Price;
MODEL	        COLOR	    PRICE
sub	        green	    8,000
van	        blue	    8,000
sedan	        red	    10,000
convertible     blue	    15,000
coupe	        red	    20,000

Since WITH TIES argument is not supported by Snowflake it is being removed from the TOP clause, that's why the result of executing the query in Snowflake is not equivalent to SQL Server.

Known Issues

1. PERCENT argument is not supported by Snowflake

Since the PERCENT argument is not supported by Snowflake it is being removed from the TOP clause and a warning is being added. Functional equivalence mismatches in the results could happen.

2. WITH TIES argument is not supported by Snowflake

Since the WITH TIES argument is not supported by Snowflake it is being removed from the TOP clause and a warning is being added. Functional equivalence mismatches in the results could happen.

Related EWIs

: THE STATEMENT IS NOT SUPPORTED IN SNOWFLAKE

SQLServer TOP documentation
SQL Server TOP documentation
Snowflake TOP documentation
SSC-EWI-00040