by: Sanjay Minni |
last post by:
What is the datatype to be used
for Primary Key columns for most
optimised access given that
- There will be a single column primary key only
- The values will only be integers (but as...
|
by: Girish Agarwal |
last post by:
Hi All,
I have a database consisting of 2 tables.
patient_info ( Patient Information ).Looks like
lastname VARCHAR(10)
fname VARCHAR(10)
ssno INT(9) PRIMARY KEY
ID INT(4) AUTO_INCREMENT
...
|
by: Girish Agarwal |
last post by:
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Note: forwarded message attached.
__________________________________
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by: Bob |
last post by:
Hi,
Does anyone know why forgein key constraints are not enforced when
updateing multiple tables using a combination of views and rules?
This doesn't seem to be a major problem as I can...
|
by: David Allison |
last post by:
Foriegn Key Required - Yes - no wonder it didnt work. Now they tell me.
--
Dave Allison
|
by: raghunana |
last post by:
hello friends,
i am a beginer.I was unable to add a foriegn key constraint to my NAMES table which refers my EMPLOYEE TABLE
SQL> desc employee
Name Null? ...
|
by: adham |
last post by:
Hey there,
Im not even sure if im using the terminology correctly. Anyway heres
my questions. I have a three tables. The main table has two ID fields.
A website id, which is the primary key in...
|
by: mailavi |
last post by:
Hi! sir
is it compulsory that a Foriegn Key must be a Primary Key
and 2) what is composite Key(2 primary key in a table) ok fine.....how should it be refered into a table.
ex: ...
|
by: jamesd0142 |
last post by:
select 'ALTER TABLE ' + primary_table + ' drop CONSTRAINT '
+ primary_key_name + ' FOREIGN KEY (' + foreign_column_1 + ')'
from sysfkeys order by foreign_table
How can I change this code to...
|
by: taylorcarr |
last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
|
by: Charles Arthur |
last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
|
by: aa123db |
last post by:
Variable and constants
Use var or let for variables and const fror constants.
Var foo ='bar';
Let foo ='bar';const baz ='bar';
Functions
function $name$ ($parameters$) {
}
...
|
by: ryjfgjl |
last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
|
by: ryjfgjl |
last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
|
by: BarryA |
last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
|
by: nemocccc |
last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
|
by: Sonnysonu |
last post by:
This is the data of csv file
1 2 3
1 2 3
1 2 3
1 2 3
2 3
2 3
3
the lengths should be different i have to store the data by column-wise with in the specific length.
suppose the i have to...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
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