To get the materials for this presentation: http://www.aaronbuma.com/2015/04/sql-table-data-operations-schemas-and-synonyms/ For any of my previous presentations visit: http://www.aaronbuma.com/category/sql-training/

1. Presented by Aaron Buma

2. Table Data Operations
DELETE TRUNCATE
 You can filter on what you
DELETE
 IDENTITY counters are not
reset
 Can be rolled back (each row
logged)
 You can’t filter, it clears whole
table
 Resets the IDENTITY counter
 Cannot be rolled back (only
page destruction logged)
 Can’t do if: there are triggers,
table is in log shipping or if it
has FK’s

3. Schemas
 Default is “dbo”
 Ability to group objects
 A layer of permissions between Database and Object
levels
 Clean Code – Intent through name
 Duplicate object names, but in different schemas

4. Schemas – Can be applied to:
 Table
 View
 Stored procedure
 Function (all 3 types)
 CLR table-valued
function
 CLR stored procedure
 CLS scalar function
 CLR aggregate function
 Extended SPROC

5. Synonyms
 Create a short-hand name to a fully qualified object
 Databasename. SchemaName.tableOrders -> orders
 SELECT * FROM Databasename. SchemaName.tableOrders;
 SELECT * FROM orders;
 Double-Edged Sword –
 Abstracts underlying structure
 Extra level of complexity

6. Synonyms – Data Permissions
 CONTROL
 DELETE
 EXECUTE
 INSERT
 SELECT
 UPDATE
 TAKE OWNERSHIP
 VIEW DEFINITION

7. Synonyms - Limitations
 Loosely bound – no warnings of references with delete
 Can’t be referenced in a DDL
 No Chaining
 When being created, the object it is referencing
doesn’t have to exist

8. Demo