SQL Window Functions Series: RANK() and DENSE_RANK()
Welcome to the fascinating world of SQL window functions! Today, we'll explore in detail: RANK() and DENSE_RANK().
2023-11-20 (first published: 2023-11-15)
7,348 reads
Sql Functions
Creating and Using Inline Table-Valued Functions
Inline Table Valued Functions (iTVFs) are one type of user defined function that is available to implement in SQL Server since SQL Server 2000.
iTVFs remain a very useful tool in our SQL armoury, so let's quickly revisit them and the different ways we can use them in our code.
2020-10-07 (first published: 2020-09-08)
41,617 reads
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Question of the Day
STRING_AGG's behavior
Executing the following script (Sql Server 2022), you get the table t0 with 10 rows:
CREATE TABLE t0
( id INT PRIMARY KEY
, field1 VARCHAR(1000)
, field2 VARCHAR(MAX));
INSERT INTO t0
SELECT
gs.value
, REPLICATE ('X', 1000)
, REPLICATE ('Y', 1000)
FROM generate_series(1, 10, 1) gs;
GOWhat happens if you execute the following statements?
select STRING_AGG(field1, ';') within group (order by id) from t0;
select STRING_AGG(field2, ';') within group (order by id) from t0;