SnowConvert AI - SQL Server-Azure Synapse - DMLs¶

WITH ctetable(col1, col2) as 
    (
        SELECT col1, col2
        FROM t1 poh
        where poh.col1 = 16 and poh.col2 = 88
    ),
    finalCte As
    (
        SELECT col1 FROM ctetable  
    )  
    MERGE  
  table1 AS target
  USING finalCte AS source  
  ON (target.ID = source.COL1)
  WHEN MATCHED THEN UPDATE SET target.ID = source.Col1
  WHEN NOT MATCHED THEN INSERT (ID, col1) VALUES (source.COL1, source.COL1 );

MERGE INTO table1 AS target
USING (
  --** SSC-PRF-TS0001 - PERFORMANCE WARNING - RECURSION FOR CTE NOT CHECKED. MIGHT REQUIRE RECURSIVE KEYWORD **
  WITH ctetable (
    col1,
    col2
  ) as
       (
           SELECT
           col1,
           col2
           FROM
           t1 poh
           where
           poh.col1 = 16 and poh.col2 = 88
       ),
           finalCte As
               (
                   SELECT
           col1
           FROM
           ctetable
               )
           SELECT
           *
           FROM
           finalCte
) AS source
ON (target.ID = source.COL1)
WHEN MATCHED THEN
           UPDATE SET
           target.ID = source.Col1
WHEN NOT MATCHED THEN
           INSERT (ID, col1) VALUES (source.COL1, source.COL1);

WITH ctetable(col1, col2) AS 
    (
        SELECT col1, col2
        FROM table2 poh
        WHERE poh.col1 = 5 and poh.col2 = 4
    )
UPDATE tab1
SET ID = 8, COL1 = 8
FROM table1 tab1
INNER JOIN ctetable CTE ON tab1.ID = CTE.col1;

UPDATE dbo.table1 tab1
    SET
        ID = 8,
        COL1 = 8
    FROM
        (
            WITH ctetable (
                col1,
                col2
            ) AS
                   (
                       SELECT
                           col1,
                           col2
                       FROM
                           table2 poh
                       WHERE
                           poh.col1 = 5 and poh.col2 = 4
                   )
                   SELECT
                       *
                   FROM
                       ctetable
        ) AS CTE
    WHERE
        tab1.ID = CTE.col1;

CREATE TABLE Employees (
    EmployeeID INT PRIMARY KEY,
    FirstName VARCHAR(50),
    LastName VARCHAR(50),
    DepartmentID INT
);

CREATE TABLE Departments (
    DepartmentID INT PRIMARY KEY,
    DepartmentName VARCHAR(50)
);

INSERT INTO Employees (EmployeeID, FirstName, LastName, DepartmentID) VALUES
(1, 'John', 'Doe', 1),
(2, 'Jane', 'Smith', 2),
(3, 'Bob', 'Johnson', 1),
(4, 'Alice', 'Brown', 3),
(5, 'Michael', 'Davis', NULL);

INSERT INTO Departments (DepartmentID, DepartmentName) VALUES
(1, 'Sales'),
(2, 'Marketing'),
(3, 'Engineering'),
(4, 'Finance');

CREATE OR REPLACE TABLE Employees (
    EmployeeID INT PRIMARY KEY,
    FirstName VARCHAR(50),
    LastName VARCHAR(50),
    DepartmentID INT
);

CREATE OR REPLACE TABLE Departments (
    DepartmentID INT PRIMARY KEY,
    DepartmentName VARCHAR(50)
);

INSERT INTO Employees (EmployeeID, FirstName, LastName, DepartmentID) VALUES
(1, 'John', 'Doe', 1),
(2, 'Jane', 'Smith', 2),
(3, 'Bob', 'Johnson', 1),
(4, 'Alice', 'Brown', 3),
(5, 'Michael', 'Davis', NULL);

INSERT INTO Departments (DepartmentID, DepartmentName) VALUES
(1, 'Sales'),
(2, 'Marketing'),
(3, 'Engineering'),
(4, 'Finance');

 DELETE T1 FROM Departments T2, Employees T1 WHERE T1.DepartmentID = T2.DepartmentID

DELETE FROM
Employees T1
USING Departments T2
WHERE
T1.DepartmentID = T2.DepartmentID;

 create table duplicatedRows(
    someID int,
    col2 bit,
    col3 bit,
    col4 bit,
    col5 bit
);

insert into duplicatedRows VALUES(10, 1, 0, 0, 1);
insert into duplicatedRows VALUES(10, 1, 0, 0, 1);
insert into duplicatedRows VALUES(11, 1, 1, 0, 1);
insert into duplicatedRows VALUES(12, 0, 0, 1, 1);
insert into duplicatedRows VALUES(12, 0, 0, 1, 1);
insert into duplicatedRows VALUES(13, 1, 0, 1, 0);
insert into duplicatedRows VALUES(14, 1, 0, 1, 0);
insert into duplicatedRows VALUES(14, 1, 0, 1, 0);

select * from duplicatedRows;

 DELETE f FROM (
	select  someID, row_number() over (
		partition by someID, col2
		order by
			case when COL3 = 1 then 1 else 0 end
			+ case when col4 = 1 then 1 else 0 end
			+ case when col5 = 1 then 1 else 0 end
			asc
		) as rownum
	from
		duplicatedRows
	) f where f.rownum > 1;
	
select * from duplicatedRows;

 create table duplicatedRows(
    someID int,
    col2 BOOLEAN,
    col3 BOOLEAN,
    col4 BOOLEAN,
    col5 BOOLEAN
);

insert into duplicatedRows VALUES(10, 1, 0, 0, 1);
insert into duplicatedRows VALUES(10, 1, 0, 0, 1);
insert into duplicatedRows VALUES(11, 1, 1, 0, 1);
insert into duplicatedRows VALUES(12, 0, 0, 1, 1);
insert into duplicatedRows VALUES(12, 0, 0, 1, 1);
insert into duplicatedRows VALUES(13, 1, 0, 1, 0);
insert into duplicatedRows VALUES(14, 1, 0, 1, 0);
insert into duplicatedRows VALUES(14, 1, 0, 1, 0);

select * from duplicatedRows;

   insert overwrite into duplicatedRows
            SELECT
                *
            FROM
                duplicatedRows
            QUALIFY
                ROW_NUMBER()
                over
                (partition by someID, col2
		    order by
			case when COL3 = 1 then 1 else 0 end
			+ case when col4 = 1 then 1 else 0 end
			+ case when col5 = 1 then 1 else 0 end
			asc) = 1;
	
select * from duplicatedRows;

DELETE ee
FROM Employees ee INNER JOIN Departments dept
ON ee.DepartmentID = dept.DepartmentID;

SELECT * FROM Employees;

DELETE FROM
    Employees ee
USING Departments dept
WHERE
    ee.DepartmentID = dept.DepartmentID;

SELECT
    *
FROM
    Employees;

DELETE Employees
FROM Employees LEFT JOIN Departments
ON Employees.DepartmentID = Departments.DepartmentID
WHERE Departments.DepartmentID IS NULL;

SELECT * FROM Employees;

DELETE FROM
    Employees
USING Departments
WHERE
    Departments.DepartmentID IS NULL
    AND Employees.DepartmentID = Departments.DepartmentID(+);

SELECT
    *
FROM
    Employees;

DELETE Employees
FROM Employees RIGHT JOIN Departments
ON Employees.DepartmentID = Departments.DepartmentID
WHERE Employees.DepartmentID IS NOT NULL;

SELECT * FROM Employees;

DELETE FROM
    Employees
USING Departments
WHERE
    Employees.DepartmentID IS NOT NULL
    AND Employees.DepartmentID(+) = Departments.DepartmentID;

SELECT
    *
FROM
    Employees;

 !!!RESOLVE EWI!!! /*** SSC-EWI-TS0081 - USING A FULL JOIN IN A DELETE STATEMENT IS NOT SUPPORTED ***/!!!
DELETE FROM
    Employees
USING Departments
WHERE
    Departments.DepartmentID IS NULL
    AND Employees.DepartmentID = Departments.DepartmentID;

DROP TABLE IF EXISTS [table_name], [table_name2], [table_name3]

DROP TABLE IF EXISTS table_name;

DROP TABLE IF EXISTS table_name2;

DROP TABLE IF EXISTS table_name3;

INSERT [ OVERWRITE ] INTO <target_table> [ ( <target_col_name> [ , ... ] ) ]
       {
         VALUES ( { <value> | DEFAULT | NULL } [ , ... ] ) [ , ( ... ) ]  |
         <query>
       }

[ WITH <common_table_expression> [ ,...n ] ]  
INSERT   
{  
        [ TOP ( expression ) [ PERCENT ] ]   
        [ INTO ]   
        { <object> | rowset_function_limited   
          [ WITH ( <Table_Hint_Limited> [ ...n ] ) ]  
        }  
    {  
        [ ( column_list ) ]   
        [ <OUTPUT Clause> ]  
        { VALUES ( { DEFAULT | NULL | expression } [ ,...n ] ) [ ,...n     ]   
        | derived_table   
        | execute_statement  
        | <dml_table_source>  
        | DEFAULT VALUES   
        }  
    }  
}  
[;]  
  
<object> ::=  
{   
    [ server_name . database_name . schema_name .   
      | database_name .[ schema_name ] .   
      | schema_name .   
    ]  
  table_or_view_name  
}  
  
<dml_table_source> ::=  
    SELECT <select_list>  
    FROM ( <dml_statement_with_output_clause> )   
      [AS] table_alias [ ( column_alias [ ,...n ] ) ]  
    [ WHERE <search_condition> ]  
        [ OPTION ( <query_hint> [ ,...n ] ) ] 

INSERT INTO TABLE1 VALUES (1, 2, 123, 'LiteralValue');

INSERT INTO TABLE1 VALUES (1, 2, 123, 'LiteralValue');

INSERT INTO aTable (columnA = 'varcharValue', columnB = 1);

INSERT INTO aTable (columnA = 'varcharValue', columnB = 1);