SQL Server 26 - PRIMARY KEY, NOT NULL, UNIQUE

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  1. Caleb Curry
  2. sql server
  3. tutorial 26
  4. primary key
  5. not null
  6. unique
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Комментарии
Автор

your videos is awesome!!! would you explain morE about index in SQL server? or maybe about index selecion.. thankyou!

risasujanawati
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Hi Caleb, can you do a similar video for surrogate keys? Thanks.

merciinike
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bruh. you helped more than my teacher did

WannyPena
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#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ') NOT NULL, `infor` VARCHAR(150) NOT NULL, `address` VARCHAR(150) NOT NULL )' at line 1


this is the error i have got can you please tell me

sisteminformasi
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create table City
(
CityID int Identity(1, 1) constraint pk_CityID primary key,
CityName varchar(100) constraint uk_CityName unique not null,
)
insert into City values('ynr')
insert into City values('kkr')
insert into City values('chd')
insert into City values('abc')

select * from City
sp_help City




city id city name
4 abc
3 chd
2 kkr
1 ynr


hey...diz iz wOt i got after execution of ma program...so ma question is..why it takes the output in clustered from.and why it picks up the values plz solve it..thnqu so mch

aarzoochopra
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Is not an attribut alway required ? So don't we always have to add NOT NULL or when don't we need to add NOT NULL after an atribute ?

kenzan
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Caleb, why do we still have the "DROP TABLE" line at the top? And since the name of the table is indeed Animals, why wasn't the table deleted in the last video? I must be missing something here lol

thefreaks