All end to end bullet point for TSQL coding conventions, best practices, tips and programming guidelines for sql server. This slide is really helpful for starting conversion between architects and developers. Just print 2 slide and put on your desk board.

1. T-SQLCoding Conventions, Best Practices, Tips and Programming Guidelines
BY-VISHAL PAWAR

2. T - SQL
Do not use SELECT *
Use parametrized
queries
Create Clustered and
Non-Clustered Indexes
For enumerated value
create look up Table
Think SQL injection
SP-Stores Procedure
Comment well
Singular Name for table Avoid side cursors Test - Large databases Keep clustered index
small
Store image paths or
URLs
Think usage of functions
in WHERE clauses
SP-Faster than CRUD
Consistent Names Use SET NOCOUNT ON Timeouts Awareness Avoid Cursors Use LIKE clause properly Use set-based solutions SP-Easy Maintenance
Don’t use space for
names
Un normalized – Not
Broken Business Entity
a query execution plan Use Table variable
inplace of Temp table
SQL keyword in capital
letters
Use Computed columns
for columns for function
SP- Easy Security
Prefixes Name – Think
before use , Ask Why ?
Normalized and DE
normalization
use referential integrity Use UNION ALL inplace
of UNION
Join instead of sub or
nested queries
Use Index hint SP- Test script
Try to use Identity ID
column in all Table
Do not use reserved
words
partitioning large fact
tables
Use Schema name
before SQL objects
Primary Key = Never
enter by user
Stop Waiting Around
Minimize tempdb
Contention
All Passwords should be
Encrypted
Use number in name
only if necessary
partition grain
Keep Transaction small
Fill Factor to 70 percent Locate I/O Bottlenecks
No to Shrinking Data
Files
Standardize Naming
Conventions
Use Custom Schema
Manage statistics
manually SET NOCOUNT ON
update statistics for
large Database
Root Out Problem
Queries
Automation
Normalization of data Use Constraints Appropriate Data Type Use TRY-Catch
Use WITH RECOMPILE if
required
Plan To Reuse SQL Job Monitoring
No wildcard characters
in Any Names
create an index on
Proper Column
Not to overuse nchar
and nvarchar Avoid prefix "sp_" Avoid using cursors Monitor Index Usage Database of Database
Avoid search <> and
NOT
use transactions
Avoid NULL in fixed-
length field
Proper design and
planning
cache redundant data
where appropriate
Separate Data and Log
Files
SQL Script Formatting
Use Derived tables Parallel processing Use EXISTS instead of IN Small Database
documentation
Don’t use triggers
Use Separate Staging
Databases
Use NOLOCK properly
Performance highest
priority while design
Deadlock thought
process
Avoid Having Clause Use Configuration table batch together multiple
concurrent sql queries
avoid numerous round
trips to Database
Write less think more on
TSQL Scripting

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