finish functions. starting with advanced topics csv imports

functions/call_func.py

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+import pyodbc
+
+try:
+    connection = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER=.;DATABASE=SampleDB;Trusted_Connection=yes')
+
+    cursor = connection.cursor()
+
+
+    sql_cmd="select dbo.ufn_get_cus_code(?) as cus_code"
+    
+    prm_id=4
+
+    cursor.execute(sql_cmd,prm_id)
+    
+    print("using udf to retrieve cus code...")
+
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print("Customer code for id ", prm_id, " - ", row.cus_code)
+
+    print()
+
+
+    cursor.close()
+    connection.close()
+
+except pyodbc.Error as ex:
+    print()
+    print("exception: ",ex)
+    cursor.close()
+    connection.close()
+    print()
+    exit()
+
+print()

functions/call_sys_func.py

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+import pyodbc
+
+try:
+    connection = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER=.;DATABASE=SampleDB;Trusted_Connection=yes')
+
+    cursor = connection.cursor()
+
+    cursor.execute("select HOST_NAME() as host_name")
+
+    print("[system function 1 - host_name results...]")
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print("host name:",row.host_name)
+
+    print()
+
+    cursor.execute("select DB_NAME() as current_db_name")
+    print("[system function 2 - current database results...]")
+
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print("current database name:", row.current_db_name)
+
+    print()
+
+    # sys func 3
+    prm_is_numeric = "202424"
+    cursor.execute("select ISNUMERIC(?) as is_numeric_value", prm_is_numeric)
+
+    print("[System function 3 - is numeric...]")
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print("checking to see if param", prm_is_numeric, "is numeric. check resutl (0 / false, 1 / true):", row.is_numeric_value)
+
+    print()
+
+    cursor.close()
+    connection.close()
+
+except pyodbc.Error as ex:
+    print()
+    print("exception: ",ex)
+    cursor.close()
+    connection.close()
+    print()
+    exit()
+
+print()

functions/create_function.py

@@ -0,0 +1,38 @@
+import pyodbc
+
+try:
+    connection = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER=.;DATABASE=SampleDB;Trusted_Connection=yes')
+
+    cursor = connection.cursor()
+
+
+    sql_cmd="""create function ufn_get_cus_code (@cus_id int)
+    returns varchar(50)
+    as
+    begin
+    declare @cus_code varchar(50)
+    set @cus_code = (select code from tblCustomers where id = @cus_id)
+
+    return @cus_code
+
+    end;
+    """
+
+    cursor.execute(sql_cmd)
+    connection.commit()
+    
+    print("User defined function successfully created or altered...")
+
+
+    cursor.close()
+    connection.close()
+
+except pyodbc.Error as ex:
+    print()
+    print("exception: ",ex)
+    cursor.close()
+    connection.close()
+    print()
+    exit()
+
+print()