dmls are done!

delete_no_param_tsql.py

@@ -0,0 +1,43 @@
+import pyodbc
+
+try:
+    connection = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER=.;DATABASE=SampleDB;Trusted_Connection=yes')
+
+    cursor = connection.cursor()
+
+    print("select before deleteing...")
+
+    cursor.execute("select * from tblCustomers")
+
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print(row.id, row.code, row.firstName, row.lastName)
+
+    cursor.execute("delete from tblCustomers where id = 2")
+    connection.commit()
+
+    print("select after deleting")
+    cursor.execute("select * from tblCustomers")
+
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print(row.id, row.code, row.firstName, row.lastName)
+
+
+
+    cursor.close()
+    connection.close()
+
+except pyodbc.Error as ex:
+    print()
+    print("exception: ",ex)
+    cursor.close()
+    connection.close()
+    print()
+    exit()
+
+print()

delete_with_param_tsql.py

@@ -0,0 +1,44 @@
+import pyodbc
+
+try:
+    connection = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER=.;DATABASE=SampleDB;Trusted_Connection=yes')
+
+    cursor = connection.cursor()
+
+    print("select before deleteing...")
+
+    cursor.execute("select * from tblCustomers")
+
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print(row.id, row.code, row.firstName, row.lastName)
+
+    prm_code = "code6"
+    cursor.execute("delete from tblCustomers where code = ?", prm_code)
+    connection.commit()
+
+    print("select after deleting")
+    cursor.execute("select * from tblCustomers")
+
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print(row.id, row.code, row.firstName, row.lastName)
+
+
+
+    cursor.close()
+    connection.close()
+
+except pyodbc.Error as ex:
+    print()
+    print("exception: ",ex)
+    cursor.close()
+    connection.close()
+    print()
+    exit()
+
+print()

other_queries_tsql.py

@@ -0,0 +1,58 @@
+import pyodbc
+
+try:
+    connection = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER=.;DATABASE=SampleDB;Trusted_Connection=yes')
+
+    cursor = connection.cursor()
+
+
+    # wuery 1
+    print("counting all records in table...")
+    cursor.execute("select count(*) as total_records from tblCustomers")
+
+
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print(row.total_records)
+    print("--- next query ----")
+
+    # query 2
+    print("fetching server name...")
+    cursor.execute("select @@SERVERNAME as server_name")
+
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print(row.server_name)
+    print("--- next query ----")
+
+    # query 3
+    print("some DMV stuff...")
+    cursor.execute("select top 10 wait_type, wait_time_ms from sys.dm_os_wait_stats where wait_time_ms > 5 order by wait_time_ms desc")
+
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print(row.wait_type, row.wait_time_ms)
+
+    print("--- no more queries ...  ----")
+
+
+
+
+    cursor.close()
+    connection.close()
+
+except pyodbc.Error as ex:
+    print()
+    print("exception: ",ex)
+    cursor.close()
+    connection.close()
+    print()
+    exit()
+
+print()

update_no_param_tsql.py

@@ -0,0 +1,39 @@
+import pyodbc
+
+try:
+    connection = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER=.;DATABASE=SampleDB;Trusted_Connection=yes')
+
+    cursor = connection.cursor()
+
+    print("select table before updating")
+
+    cursor.execute("select * from tblCustomers")
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print(row.id, row.code, row.firstName, row.lastName)
+
+    cursor.execute("update tblCustomers set lastName = 'lastName New 5' where id = 5")
+    connection.commit()
+
+    print("table after updating")
+    cursor.execute("select * from tblCustomers")
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print(row.id, row.code, row.firstName, row.lastName)
+
+    cursor.close()
+    connection.close()
+
+except pyodbc.Error as ex:
+    print()
+    print("exception: ",ex)
+    cursor.close()
+    connection.close()
+    print()
+    exit()
+
+print()

update_with_param_tsql.py

@@ -0,0 +1,40 @@
+import pyodbc
+
+try:
+    connection = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER=.;DATABASE=SampleDB;Trusted_Connection=yes')
+
+    cursor = connection.cursor()
+
+    print("select table before updating")
+
+    cursor.execute("select * from tblCustomers")
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print(row.id, row.code, row.firstName, row.lastName)
+
+    prm_id = 7
+    cursor.execute("update tblCustomers set lastName = 'lastName New 7' where id = ?", prm_id)
+    connection.commit()
+
+    print("table after updating")
+    cursor.execute("select * from tblCustomers")
+    while 1:
+        row = cursor.fetchone()
+        if not row:
+            break
+        print(row.id, row.code, row.firstName, row.lastName)
+
+    cursor.close()
+    connection.close()
+
+except pyodbc.Error as ex:
+    print()
+    print("exception: ",ex)
+    cursor.close()
+    connection.close()
+    print()
+    exit()
+
+print()