Database

6-Aug-05 16:25

Hey,

I am trying to teach myself SQL and have come up with a small problem. How does one use SQL to list the names of all the tables in a database? Up until now I have done it using Carlos Antollini's CADOXCatalog class[^] but I want to do it in SQL from Query Analyzer.

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Rob Graham6-Aug-05 17:25

6-Aug-05 17:25

try:

select Name, Type from sysobjects where Type = N'U' or Type = N'S'

Type 'U' is a user table , type 'S' is a system table

Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke

PJ Arends6-Aug-05 18:01

6-Aug-05 18:01

Thanks Rob, works like a charm Smile | :)

Scott Serl6-Aug-05 21:35

Scott Serl

6-Aug-05 21:35

SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = 'BASE TABLE'

PJ Arends7-Aug-05 12:32

7-Aug-05 12:32

Thanks, works great.

Not only does it work, but when I looked this method up in my SQL book it says that this is the prefered way to do this. Better to use a system view than to access system tables directly.

Now I know how to do this (and other things) with SQL Server, it would be nice to have a way that works with other Database systems (MySQL and Access in particular. None of the three methods listed here work with those two systems Frown | :(

Rob Graham7-Aug-05 15:06

7-Aug-05 15:06

To do this prgramatically (not query analyzer) Use the GetOledbSchemaTable[^] method of the OledbConnection object (or ADO connection.OpenSchema()[^]if not using .NET).

Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke

Scott Serl8-Aug-05 15:37

Scott Serl

8-Aug-05 15:37

http://dev.mysql.com/doc/mysql/en/information-schema.html[^]

I don't use MySql, but found this page which seems to address using INFORMATION_SCHEMA with MySQL.

PJ Arends8-Aug-05 16:58

8-Aug-05 16:58

Thanks for the link Smile | :)

It seems INFORMATION_SCHEMA is new in version 5. I have version 4 here. Explains why I could not get it to work D'Oh! | :doh:

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toxcct6-Aug-05 23:16

toxcct

6-Aug-05 23:16

it depends actually on which database you try to get the table names.

the answer you got seem to be for MS SQL Server, but it would have worked on Oracle DB.

you should type instead :

select table_name, table_type
    from user_tables
    order by table_type asc, table_name asc;

cheers,

TOXCCT >>> GEII power
[toxcct][VisualCalc]

how to insert data

Member 14246356-Aug-05 7:21

Member 1424635

6-Aug-05 7:21

how to insert data directly into ms sql server 2000 database by using asp.net with vb.net and how to update data.

Re: how to insert data

toxcct6-Aug-05 23:22

toxcct

6-Aug-05 23:22

search for ADO.NET for the access classes.

to insert, use the insert SQL command :

insert into table
    list_of_columns_to_insert
    values(list_of_values);

to update, use the update SQL command :

update table
    setcolumn1 = value1,
       column2 = value2
    where condition;

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: how to insert data

Frank Kerrigan8-Aug-05 2:19

Frank Kerrigan

8-Aug-05 2:19

This is C# which you can easily convert.

###########################################

string myType = "Type"; ' varchar on SQL Server
string myPropID = "12"; ' Int on SQL Server

string SQLstring = "UPDATE tblZtest SET PropertyType = '" + myType + "' " +
" WHERE zTest = " + myPropID

SqlConnection myConnection = new SqlConnection(ConnectionString);
myConnection.Open();
SqlCommand myCommand = new SqlCommand( SQLstring, myConnection );
myCommand.ExecuteNonQuery();
myConnection.Close();

##############################################

Re: how to insert data

Colin Angus Mackay9-Aug-05 2:35

Colin Angus Mackay

9-Aug-05 2:35

Your code has a big security hole in it. It would be good not to teach the newbies bad habits. Your code is susceptable to a SQL Injection Attack.

please help...

mhmo5-Aug-05 6:46

5-Aug-05 6:46

hi I have some questions that I need to know the answers. These r in the ORACLE database.

Pleaaaaaaaaaaaaaaaaaaaaaaaaase, I need the answers sooooooooon.

answers any Q u can. Pleaaaaaaaaaaaaase.

the Q's r:

1-Write down SQL statement that shows free tablespace of one or more tablespaces. (In ORACLE)

2-Write down SQL statement that shows a particular table exists on which tablespaces.(In ORACLE)

3-. For example, one of the control file is deleted. When you start your database instance, you will receive message that database instance cannot startup. Write down steps how to resolve this task. Your steps must be outcome of implementation.(IN ORACLE)

4-Suppose you want to import data in one of the user’s schema, some tables with same names already existing in a schema. Write down tested imp command to accomplish it. Also, show the output result of your command.(IN ORACLE)

Rob Graham5-Aug-05 7:55

5-Aug-05 7:55

Sounds like you should have actually studied for this test.

Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke

mhmo5-Aug-05 8:03

5-Aug-05 8:03

I did not understand!!!

Rob Graham5-Aug-05 8:09

5-Aug-05 8:09

Your questions are almost certainly either a class assignment or a test. You won't learn anything if someone on this site does the work for you. Before anyone will, you must make some effort to work out the answers yourself, most CP regulars will help with specific questions as to why whatever you tried is not working, but few will, or should , do the work for you.

Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke

mhmo5-Aug-05 9:53

5-Aug-05 9:53

believe me man. I searched in my material and did not find any thing. And I have to submit it tommorow. Or I will fail Frown | :(

I paid for this course alot and I do not want to fail...

Albert Pascual5-Aug-05 10:25

Albert Pascual

5-Aug-05 10:25

Want to pay some more? Poke tongue | ;-P

mhmo5-Aug-05 10:38

Re: please help... [edit]

5-Aug-05 10:38

NOOOOOOOOOOOOOOO

Mad | :mad:

toxcct6-Aug-05 23:25

toxcct

6-Aug-05 23:25

1. speak english correcly, because if you're looking for answer, you should first be understood

2. do your homework by yourself

Suspicious | :suss:

ps: have you failed actually ? Laugh | :laugh:

TOXCCT >>> GEII power
[toxcct][VisualCalc]

How to backup all databases

Albert Pascual5-Aug-05 6:34

Albert Pascual

5-Aug-05 6:34

Got a backup system that backs up directories. I want to backup all the databases, they could be hundreds and a few more every day. The problem is that SQL keeps the databases lock for reading, so I cannot back them up every night. I need to manually stop the server in order to back them up. Any way to schedule the server to stop at 3 AM to 5 AM? or something like that?

Al

Re: How to backup all databases

Rob Graham5-Aug-05 8:23