Displaying the order of the columns of a tableWhy should I create an ID column when I can use others as key fields?How do you create a relationship to a non-primary key in SQL Server?Oracle GoldenGate add trandata errorsError while executing SSIS package which contains Script component through SQL Server Agent JobShould I mark a composite index as unique if it contains the primary key?Can I rely on reading SQL Server Identity values in order?Order by custom filter without certain dataSQL Server query problem when selecting data from child table based on column in parent tableQuery runs slowly when a non-indexed column is added to the WHERE clauseProper table design for sparse primary key
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Displaying the order of the columns of a table
Why should I create an ID column when I can use others as key fields?How do you create a relationship to a non-primary key in SQL Server?Oracle GoldenGate add trandata errorsError while executing SSIS package which contains Script component through SQL Server Agent JobShould I mark a composite index as unique if it contains the primary key?Can I rely on reading SQL Server Identity values in order?Order by custom filter without certain dataSQL Server query problem when selecting data from child table based on column in parent tableQuery runs slowly when a non-indexed column is added to the WHERE clauseProper table design for sparse primary key
I created a table, and want to find the display the order of its columns.
Should I use the following query to display the info ordered by column_id?
select * from sys.columns c
where c.object_id = object_id('Customer')
order by column_id
create table dbo.Customer
(
CustomerId int primary key,
CustomerName varchar(255),
CustomerAddress varchar(255),
EnrollmentDate date
)
Reading Microsoft SQL Server documentation, I am seeing the information below, so want to be sure:
Column name Data type Description
----------- --------- ----------------------------------------------
column_id: int ID of the column. Is unique within the object.
Column IDs might not be sequential.
sql-server sql-server-2016
edited 2 hours ago
MDCCL
6,85331745
asked 4 hours ago
John ThomasJohn Thomas
211
New contributor
John Thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I created a table, and want to find the display the order of its columns.
Should I use the following query to display the info ordered by column_id?
select * from sys.columns c
where c.object_id = object_id('Customer')
order by column_id
create table dbo.Customer
(
CustomerId int primary key,
CustomerName varchar(255),
CustomerAddress varchar(255),
EnrollmentDate date
)
Reading Microsoft SQL Server documentation, I am seeing the information below, so want to be sure:
Column name Data type Description
----------- --------- ----------------------------------------------
column_id: int ID of the column. Is unique within the object.
Column IDs might not be sequential.
sql-server sql-server-2016
edited 2 hours ago
MDCCL
6,85331745
asked 4 hours ago
John ThomasJohn Thomas
211
New contributor
John Thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I created a table, and want to find the display the order of its columns.
Should I use the following query to display the info ordered by column_id?
select * from sys.columns c
where c.object_id = object_id('Customer')
order by column_id
create table dbo.Customer
(
CustomerId int primary key,
CustomerName varchar(255),
CustomerAddress varchar(255),
EnrollmentDate date
)
Reading Microsoft SQL Server documentation, I am seeing the information below, so want to be sure:
Column name Data type Description
----------- --------- ----------------------------------------------
column_id: int ID of the column. Is unique within the object.
Column IDs might not be sequential.
sql-server sql-server-2016
edited 2 hours ago
MDCCL
6,85331745
asked 4 hours ago
John ThomasJohn Thomas
211
New contributor
John Thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I created a table, and want to find the display the order of its columns.
Should I use the following query to display the info ordered by column_id?
select * from sys.columns c
where c.object_id = object_id('Customer')
order by column_id
create table dbo.Customer
(
CustomerId int primary key,
CustomerName varchar(255),
CustomerAddress varchar(255),
EnrollmentDate date
)
Reading Microsoft SQL Server documentation, I am seeing the information below, so want to be sure:
Column name Data type Description
----------- --------- ----------------------------------------------
column_id: int ID of the column. Is unique within the object.
Column IDs might not be sequential.
sql-server sql-server-2016
sql-server sql-server-2016
edited 2 hours ago
MDCCL
6,85331745
asked 4 hours ago
John ThomasJohn Thomas
211
New contributor
John Thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 hours ago
MDCCL
6,85331745
asked 4 hours ago
John ThomasJohn Thomas
211
New contributor
John Thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 hours ago
MDCCL
6,85331745
edited 2 hours ago
MDCCL
6,85331745
edited 2 hours ago
MDCCL
6,85331745
6,85331745
asked 4 hours ago
John ThomasJohn Thomas
211
New contributor
John Thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
John ThomasJohn Thomas
211
asked 4 hours ago
John ThomasJohn Thomas
211
211
New contributor
John Thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
John Thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
John Thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
column_id is a reasonable proxy for the column ordinal, since it is impossible to insert a column between two existing columns in SQL Server without dropping and recreating the table.
As the documentation states, column_id values may not be sequential if you drop a column from a table.
You can also make use of the COLUMNPROPERTY() function to return the actual ordinal for each column.
Consider a quick example:
IF OBJECT_ID(N'dbo.t', N'U') IS NOT NULL
DROP TABLE dbo.t;
CREATE TABLE dbo.t
(
c1 int
, c2 int
, c3 int
, c4 int
);
ALTER TABLE dbo.t DROP COLUMN c1;
ALTER TABLE dbo.t ADD c5 int;
ALTER TABLE dbo.t ALTER COLUMN c2 char(3);
SELECT o.name
, c.name
, c.column_id
, ordinal = COLUMNPROPERTY(c.object_id, c.name, 'ordinal')
FROM sys.columns c
INNER JOIN sys.objects o ON c.object_id = o.object_id
WHERE o.name = N't'
The output looks like:
╔══════╦══════╦═══════════╦═════════╗
║ name ║ name ║ column_id ║ ordinal ║
╠══════╬══════╬═══════════╬═════════╣
║ t ║ c2 ║ 2 ║ 1 ║
║ t ║ c3 ║ 3 ║ 2 ║
║ t ║ c4 ║ 4 ║ 3 ║
║ t ║ c5 ║ 5 ║ 4 ║
╚══════╩══════╩═══════════╩═════════╝
answered 3 hours ago
Max VernonMax Vernon
51.9k13114230
thanks, can we assume column order will always go ascending order, so I if I delete columns, we get them sequenced in order, that's all I really care about, example : 1,3,4,7,8, (if we delete some columns?)
– John Thomas
3 hours ago
another interesting note, Ordinal is not in Microsoft documentation, wondering if they are trying to deprecate docs.microsoft.com/en-us/sql/t-sql/functions/… , mssqltips.com/sqlservertip/1298/…
– John Thomas
3 hours ago
add a comment |
Just to propose an additional answer that will tell you the actual column position instead of column_id
select column_name, ORDINAL_POSITION
from INFORMATION_SCHEMA.COLUMNS
where table_name = 'your_table'
answered 3 hours ago
PadwanPadwan
1916
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
column_id is a reasonable proxy for the column ordinal, since it is impossible to insert a column between two existing columns in SQL Server without dropping and recreating the table.
As the documentation states, column_id values may not be sequential if you drop a column from a table.
You can also make use of the COLUMNPROPERTY() function to return the actual ordinal for each column.
Consider a quick example:
IF OBJECT_ID(N'dbo.t', N'U') IS NOT NULL
DROP TABLE dbo.t;
CREATE TABLE dbo.t
(
c1 int
, c2 int
, c3 int
, c4 int
);
ALTER TABLE dbo.t DROP COLUMN c1;
ALTER TABLE dbo.t ADD c5 int;
ALTER TABLE dbo.t ALTER COLUMN c2 char(3);
SELECT o.name
, c.name
, c.column_id
, ordinal = COLUMNPROPERTY(c.object_id, c.name, 'ordinal')
FROM sys.columns c
INNER JOIN sys.objects o ON c.object_id = o.object_id
WHERE o.name = N't'
The output looks like:
╔══════╦══════╦═══════════╦═════════╗
║ name ║ name ║ column_id ║ ordinal ║
╠══════╬══════╬═══════════╬═════════╣
║ t ║ c2 ║ 2 ║ 1 ║
║ t ║ c3 ║ 3 ║ 2 ║
║ t ║ c4 ║ 4 ║ 3 ║
║ t ║ c5 ║ 5 ║ 4 ║
╚══════╩══════╩═══════════╩═════════╝
answered 3 hours ago
Max VernonMax Vernon
51.9k13114230
thanks, can we assume column order will always go ascending order, so I if I delete columns, we get them sequenced in order, that's all I really care about, example : 1,3,4,7,8, (if we delete some columns?)
– John Thomas
3 hours ago
another interesting note, Ordinal is not in Microsoft documentation, wondering if they are trying to deprecate docs.microsoft.com/en-us/sql/t-sql/functions/… , mssqltips.com/sqlservertip/1298/…
– John Thomas
3 hours ago
add a comment |
column_id is a reasonable proxy for the column ordinal, since it is impossible to insert a column between two existing columns in SQL Server without dropping and recreating the table.
As the documentation states, column_id values may not be sequential if you drop a column from a table.
You can also make use of the COLUMNPROPERTY() function to return the actual ordinal for each column.
Consider a quick example:
IF OBJECT_ID(N'dbo.t', N'U') IS NOT NULL
DROP TABLE dbo.t;
CREATE TABLE dbo.t
(
c1 int
, c2 int
, c3 int
, c4 int
);
ALTER TABLE dbo.t DROP COLUMN c1;
ALTER TABLE dbo.t ADD c5 int;
ALTER TABLE dbo.t ALTER COLUMN c2 char(3);
SELECT o.name
, c.name
, c.column_id
, ordinal = COLUMNPROPERTY(c.object_id, c.name, 'ordinal')
FROM sys.columns c
INNER JOIN sys.objects o ON c.object_id = o.object_id
WHERE o.name = N't'
The output looks like:
╔══════╦══════╦═══════════╦═════════╗
║ name ║ name ║ column_id ║ ordinal ║
╠══════╬══════╬═══════════╬═════════╣
║ t ║ c2 ║ 2 ║ 1 ║
║ t ║ c3 ║ 3 ║ 2 ║
║ t ║ c4 ║ 4 ║ 3 ║
║ t ║ c5 ║ 5 ║ 4 ║
╚══════╩══════╩═══════════╩═════════╝
answered 3 hours ago
Max VernonMax Vernon
51.9k13114230
thanks, can we assume column order will always go ascending order, so I if I delete columns, we get them sequenced in order, that's all I really care about, example : 1,3,4,7,8, (if we delete some columns?)
– John Thomas
3 hours ago
another interesting note, Ordinal is not in Microsoft documentation, wondering if they are trying to deprecate docs.microsoft.com/en-us/sql/t-sql/functions/… , mssqltips.com/sqlservertip/1298/…
– John Thomas
3 hours ago
add a comment |
column_id is a reasonable proxy for the column ordinal, since it is impossible to insert a column between two existing columns in SQL Server without dropping and recreating the table.
As the documentation states, column_id values may not be sequential if you drop a column from a table.
You can also make use of the COLUMNPROPERTY() function to return the actual ordinal for each column.
Consider a quick example:
IF OBJECT_ID(N'dbo.t', N'U') IS NOT NULL
DROP TABLE dbo.t;
CREATE TABLE dbo.t
(
c1 int
, c2 int
, c3 int
, c4 int
);
ALTER TABLE dbo.t DROP COLUMN c1;
ALTER TABLE dbo.t ADD c5 int;
ALTER TABLE dbo.t ALTER COLUMN c2 char(3);
SELECT o.name
, c.name
, c.column_id
, ordinal = COLUMNPROPERTY(c.object_id, c.name, 'ordinal')
FROM sys.columns c
INNER JOIN sys.objects o ON c.object_id = o.object_id
WHERE o.name = N't'
The output looks like:
╔══════╦══════╦═══════════╦═════════╗
║ name ║ name ║ column_id ║ ordinal ║
╠══════╬══════╬═══════════╬═════════╣
║ t ║ c2 ║ 2 ║ 1 ║
║ t ║ c3 ║ 3 ║ 2 ║
║ t ║ c4 ║ 4 ║ 3 ║
║ t ║ c5 ║ 5 ║ 4 ║
╚══════╩══════╩═══════════╩═════════╝
answered 3 hours ago
Max VernonMax Vernon
51.9k13114230
column_id is a reasonable proxy for the column ordinal, since it is impossible to insert a column between two existing columns in SQL Server without dropping and recreating the table.
As the documentation states, column_id values may not be sequential if you drop a column from a table.
You can also make use of the COLUMNPROPERTY() function to return the actual ordinal for each column.
Consider a quick example:
IF OBJECT_ID(N'dbo.t', N'U') IS NOT NULL
DROP TABLE dbo.t;
CREATE TABLE dbo.t
(
c1 int
, c2 int
, c3 int
, c4 int
);
ALTER TABLE dbo.t DROP COLUMN c1;
ALTER TABLE dbo.t ADD c5 int;
ALTER TABLE dbo.t ALTER COLUMN c2 char(3);
SELECT o.name
, c.name
, c.column_id
, ordinal = COLUMNPROPERTY(c.object_id, c.name, 'ordinal')
FROM sys.columns c
INNER JOIN sys.objects o ON c.object_id = o.object_id
WHERE o.name = N't'
The output looks like:
╔══════╦══════╦═══════════╦═════════╗
║ name ║ name ║ column_id ║ ordinal ║
╠══════╬══════╬═══════════╬═════════╣
║ t ║ c2 ║ 2 ║ 1 ║
║ t ║ c3 ║ 3 ║ 2 ║
║ t ║ c4 ║ 4 ║ 3 ║
║ t ║ c5 ║ 5 ║ 4 ║
╚══════╩══════╩═══════════╩═════════╝
answered 3 hours ago
Max VernonMax Vernon
51.9k13114230
edited 3 hours ago
answered 3 hours ago
Max VernonMax Vernon
51.9k13114230
answered 3 hours ago
Max VernonMax Vernon
51.9k13114230
answered 3 hours ago
Max VernonMax Vernon
51.9k13114230
51.9k13114230
thanks, can we assume column order will always go ascending order, so I if I delete columns, we get them sequenced in order, that's all I really care about, example : 1,3,4,7,8, (if we delete some columns?)
– John Thomas
3 hours ago
another interesting note, Ordinal is not in Microsoft documentation, wondering if they are trying to deprecate docs.microsoft.com/en-us/sql/t-sql/functions/… , mssqltips.com/sqlservertip/1298/…
– John Thomas
3 hours ago
add a comment |
thanks, can we assume column order will always go ascending order, so I if I delete columns, we get them sequenced in order, that's all I really care about, example : 1,3,4,7,8, (if we delete some columns?)
– John Thomas
3 hours ago
another interesting note, Ordinal is not in Microsoft documentation, wondering if they are trying to deprecate docs.microsoft.com/en-us/sql/t-sql/functions/… , mssqltips.com/sqlservertip/1298/…
– John Thomas
3 hours ago
thanks, can we assume column order will always go ascending order, so I if I delete columns, we get them sequenced in order, that's all I really care about, example : 1,3,4,7,8, (if we delete some columns?)
– John Thomas
3 hours ago
thanks, can we assume column order will always go ascending order, so I if I delete columns, we get them sequenced in order, that's all I really care about, example : 1,3,4,7,8, (if we delete some columns?)
– John Thomas
3 hours ago
another interesting note, Ordinal is not in Microsoft documentation, wondering if they are trying to deprecate docs.microsoft.com/en-us/sql/t-sql/functions/… , mssqltips.com/sqlservertip/1298/…
– John Thomas
3 hours ago
another interesting note, Ordinal is not in Microsoft documentation, wondering if they are trying to deprecate docs.microsoft.com/en-us/sql/t-sql/functions/… , mssqltips.com/sqlservertip/1298/…
– John Thomas
3 hours ago
add a comment |
Just to propose an additional answer that will tell you the actual column position instead of column_id
select column_name, ORDINAL_POSITION
from INFORMATION_SCHEMA.COLUMNS
where table_name = 'your_table'
answered 3 hours ago
PadwanPadwan
1916
add a comment |
Just to propose an additional answer that will tell you the actual column position instead of column_id
select column_name, ORDINAL_POSITION
from INFORMATION_SCHEMA.COLUMNS
where table_name = 'your_table'
answered 3 hours ago
PadwanPadwan
1916
add a comment |
Just to propose an additional answer that will tell you the actual column position instead of column_id
select column_name, ORDINAL_POSITION
from INFORMATION_SCHEMA.COLUMNS
where table_name = 'your_table'
answered 3 hours ago
PadwanPadwan
1916
Just to propose an additional answer that will tell you the actual column position instead of column_id
select column_name, ORDINAL_POSITION
from INFORMATION_SCHEMA.COLUMNS
where table_name = 'your_table'
answered 3 hours ago
PadwanPadwan
1916
answered 3 hours ago
PadwanPadwan
1916
answered 3 hours ago
PadwanPadwan
1916
answered 3 hours ago
PadwanPadwan
1916
1916
add a comment |
add a comment |
John Thomas is a new contributor. Be nice, and check out our Code of Conduct.
John Thomas is a new contributor. Be nice, and check out our Code of Conduct.
John Thomas is a new contributor. Be nice, and check out our Code of Conduct.
John Thomas is a new contributor. Be nice, and check out our Code of Conduct.
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