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In sybase, I have a table "abc" having 5 fields(name, roll, address, desc,path). If i would use 'sp_help tablename' then i can see all properties of all fields how i can get properties of a particular field i.e. roll or any one field and their properties using sql or pl/sql.
As we know that we can not use any parameters in sp_help so is there any way to to get the properties of a field, (pl/sql or sql)?
Thanks in advance
sp_help tablename
This depends on what specific properties you are looking for. Assuming you are looking for Table, Column, Datatype, Datatype Length - you have to join sysobjects, syscolumns, and systypes
use YOURDB
go
select o.name, c.name, t.usertype, c.length
from
sysobject o,
syscolumns c,
systypes t
where o.id = c.id
and c.usertype = t.usertype
and o.name like "YOUR_TABLE"
and c.name like "YOUR_COLUMN"
go
If you want more than that, you'll have to bring in other columns and/or tables into the query like sysdepends, sysdefaults or sysconstraints
More information about the system tables can be found here:
Sybase ASE Reference Manual: Tables > System Tables
And the system table diagram, which shows the column mappings can be found here:
http://infocenter.sybase.com/help/topic/com.sybase.infocenter.dc70204.1550/pdf/a155pst.pdf
Also, FYI - Sybase uses T-SQL (like SQL Server), not pl/sql.
Related
I have a big database and a lot tables and I would like to identify what columns are not been called by any store procedure or any query, or not in use.
I'm not sure if this is what you're looking for, but in your DB under views there's a folder for System Views - three of which are the following. Looking in all_objects look for the table name, then use the object_id of that table to select from the other queries. There may be other meta-data here that is appropriate for your need.
SELECT *
FROM sys.all_objects
SELECT *
FROM sys.all_columns
WHERE object_id = 981578535
SELECT *
FROM sys.all_views
WHERE object_id = 981578535
After an investigation I have found a new feature of SQL Server called Query Store where you can find in disk the executions with other information. If you have a SQL Server 2016 instance you can find it in the properties of the data base. There you can change the amount of days to capture and then you can in theory try to find the columns in question. The idea of this technology is to give you more options for performance tuning.
You can find the information with this query :
SELECT TOP 10 qt.query_sql_text, q.query_id,
qt.query_text_id, p.plan_id, rs.last_execution_time
FROM sys.query_store_query_text AS qt
JOIN sys.query_store_query AS q
ON qt.query_text_id = q.query_text_id
JOIN sys.query_store_plan AS p
ON q.query_id = p.query_id
JOIN sys.query_store_runtime_stats AS rs
ON p.plan_id = rs.plan_id
where qt.query_sql_text LIKE '%ColumnToFind%'
ORDER BY rs.last_execution_time;
Credits: Query Store
I have a huge database with 50+ Views, Tables and Stored Procedures. I want to run a search to find I specific piece of text, i.e a table name, to see if it is being referenced anywhere.
I originally tried a C# route but I am suspecting this will be easier in SQL. The logic I am thinking about is possibly creating a query that loops through all Tables, Views and Stored Procedures and returns the data if it is available.
Any ideas?
In the below query, instead of the matchingstring replace your tablename, it will returns list of objects related to the search string
SELECT DISTINCT SO.[name]
FROM sysobjects SO
JOIN syscomments SC ON SC.Id = SO.Id
WHERE SC.[text] LIKE '%matchingstring%'
SELECT object_name(id) FROM sys.syscomments WHERE text LIKE'%yourtablename%'
Does there exist a system stored procedure that lists the names of all tables in a SQL Server 2000 database and per table the names of all columns in that table? I want to export this data to a file for documentation.
I don't know if a system stored procedure exists, but I use this:
SELECT SysObjects.[Name] as TableName,
SysColumns.[Name] as ColumnName,
SysTypes.[Name] As DataType,
SysColumns.[Length] As Length
FROM
SysObjects INNER JOIN SysColumns
ON SysObjects.[Id] = SysColumns.[Id]
INNER JOIN SysTypes
ON SysTypes.[xtype] = SysColumns.[xtype]
WHERE SysObjects.[type] = 'U'
ORDER BY SysObjects.[Name]
In SQL-Server 2005+ you can do it using system views sys.columns and sys.tables
SELECT t.name TableName, c.name ColumnName
FROM sys.tables t
JOIN sys.columns c ON t.object_id=c.object_id
And you can also query the INFORMATION_SCHEMA.COLUMNS view.
It's also safer to use this view. Microsoft says this about the view "Querying the system tables directly may not provide accurate information if system tables are changed in future releases. These views provide an internal, system table-independent view of the SQL Server meta data. Information schema views allow applications to work properly even though significant changes have been made to the system tables."
I need to change a column's data type but I do not every location in the database that might be referencing it. Is there a script or application that can search all views, stored procedures, functions, table computed columns, etc. within a database and show what is referencing the column? I am using SQL Server 2005 Standard.
Thanks,
Aaron
You can always inspect the sys.columns catalog view:
SELECT
c.NAME 'Col Name',
OBJECT_NAME(c.OBJECT_ID) 'Table Name',
t.name
FROM
sys.columns c
INNER JOIN
sys.types t ON c.system_type_id = t.system_type_id
WHERE
c.Name = 'your-column-name-here'
and based on that information, you can generate the ALTER statements for a database:
SELECT
'ALTER TABLE dbo.' + OBJECT_NAME(c.OBJECT_ID) +
' ALTER COLUMN ' + c.NAME ' NewDataType NULL'
FROM
sys.columns c
WHERE
c.Name = 'your-column-name-here'
This query generates a set of ALTER TABLE .... statements which you can then copy to a SSMS query window and execute.
Word of warning: if any of the columns are being referenced - in a foreign key relationship, or if there's a default or check constraint on them - this approach might fail. In that case, you'd need to do some extra steps for those columns (like drop the constraints first etc.)
Update: this searches for the columns as defined in tables.
If you need to search into stored procedures, view and functions as well, I would strongly recommend using Red-Gate's excellent and free (!!) SQL Search utility - excellent stuff!
I like using a free search add-in tool from redgate software. I'm amazed at how useful it is - you can find all references to text quickly with it.
This description is from SQL Curry:
SQL Search finds fragments of SQL text within stored procedures, functions, views and more and once you find them, it quickly allows you to click and jump to the objects, wherever they happen to be on your servers. It’s pretty cool!
Here is the link: SQL Search
This query will help you find any table's column and the column it is referring to -
SELECT OBJECT_NAME(f.parent_object_id) AS [Table], COL_NAME(fc.parent_object_id,fc.parent_column_id) AS [Column],
OBJECT_NAME (f.referenced_object_id) AS RefTable, COL_NAME(fc.referenced_object_id,fc.referenced_column_id) AS RefColumn,
f.name AS FK
FROM sys.foreign_keys AS f INNER JOIN sys.foreign_key_columns AS fc
ON f.OBJECT_ID = fc.constraint_object_id
WHERE OBJECT_NAME(f.parent_object_id) = '<your table name>'
AND COL_NAME(fc.parent_object_id,fc.parent_column_id) = '<your column name>'
I work for Red Gate and I see that SQL Search as already been mentioned. Glad that works for you. Another tool that can specifically list column dependencies is SQL Prompt 5, due to be released soon. You can download the EA build by visiting: http://www.surveymk.com/s.aspx?sm=zDJogAY5rwdIwOX/SqtTCQ%3d%3d and joining the early access list. I'd welcome you to try this out and let me know if it doesn't match your requirements. Another great feature it has is the ability to list your invalid objects. In other words, if you rename a column and you have a stored procedure that references the old column, it will draw your attention to this.
How would I figure out what type of sql code such as procs, functions, views etc. are interacting with my table called TABLE1 through out a given database. Sample code would be very helpful for me.
thanks
select so.name, so.xtype
from sysobjects so (nolock)
inner join syscomments sc (nolock) on sc.id = so.id
where sc.text like '%tablename%'
This code will search all SQL Server objects for a reference to your table. You have to run this query for each database.
If a stored procedure uses your table it will appear in this query. The same is true of functions, views, and triggers.
xtype tells you the type of object.
Here are the possible xtype values:
D = Field names
F = Foreign Key
FN = Function
P = Stored Procedures
PK = Primary Key
S = System Tables
U = User tables
V = Hidden tables
Not enough info in your question, but one thing you can do is use SQL Profiler to profile where INSERTs, UPDATEs, and DELETEs are coming from.
I assume you are talking about how an app is interacting with data and what name (of say a sproc) is doing the insert / update / delete.
Look at SQL Profiler, it comes with your client tools install. Filter it to only show connections to your database (either db name or ID).
If you've been good and created your SPs/views/functions after your table was created, sp_depends will tell you evertyhing referencing the table. Exept for dynamic sql that is.