SQL Best PracticesSQL SERVER BEST PRACTICES IN INDIAN STYLE

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BEST PRACTICES IN SQL SERVER

Bada hai To better Hai

Indian mentality but do not apply in database designing (Best Practices in Designing )

Column Name Data Type (current Data type) Length Data Type(after change) Length

EnrollmentHistoryId numeric 9 numeric 9

EnrollmentId numeric 9 numeric 9

ClassId numeric 9 tinyint 1

WorkSheetId numeric 9 int 4

classTeacherId numeric 9 int 4

ClassRoomId numeric 9 tinyint 1

centerId numeric 9 tinyint 1

HomeAddressId nchar 20 int 4

FriendsId numeric 9 int 4

Comments varchar 300 varchar 300

Notes varchar 300 varchar 0

CreatedBy numeric 9 int 4

CreatedDate datetime 8 small datetime 4

ModifiedBy numeric 9 int 4

ParentId numeric 9 numeric 9

ModifiedDate datetime 8 datetime 8

StatusId numeric 9 tinyint 1

SynchStatusId numeric 9 tinyint 1

Rows 753 368

No of rows in curernt database 5000000

bytes 3765000000 1840000000

KB 3676757.81 1796875

MB 3590.5838 1754.76074

GB 3.506429 1.71363354

space diffrence (GB) (aprox) 1.79279596

* above result is by just sum of max length ofvariable & non variable columns

REASON To Think

Are Ye bhi Yaad

rakho NULL hi to

Hai

It is not only about NULL but all the constraints

- thik hai / chalta hai - Indian attitude

REASON TO THINK

I LOVE “ Not IN”

MUZE TO SIRF NOT IN CLAUSE EASY LAGTA HAI - TRY JOIN AND OTHER FEATURES ALSO .

ALTHOUGH IT NOT ALWAYS BAD

“

”Let see demo

REASON To Think

SAB AANE DO

kaha paise lag

rahe hai

Free me sab chalega

BAAD ME DEKH LENGE ATTITUDE

NO FILTER CLAUSE

“

”Let see demo

REASON To Think

HAR SLOW QUERY

KA ILLAGE HAI

MERE PASS INDEX

HAI MERE PASS

PERFORMANCE WILL BE IMPROVE BY INDEX ?

“

”

Let see demo

REASON To Think

FUNCTION HI

FUNCTION

Function is good to have but if we not use it properly it will slow down system

“

”Let see demo

REASON To Think