In this tutorial i am going to explain about sql script or query to get the columns of a particular table or all the tables in the database along with datatype and default values of that particular column like null,not null,empty or getdate() etc..
In my previous article i have explained about Visual Studio Keyboard Shortcuts , How To get data from WEB API , How To Create Your First WEB API Project, Check Container Exists In Azure Blob , Convert Datatable To Json Data Array , How To Show Tooltip On Mouse Hover In Gridview and many articles in C#.Net,ASP.Net,VB.Net,Grid View,Javascript,jQuery,SQL Server and many other topics.
In some cases the developer need the columns of a table along with the datatype of that columns. I came across the situation to get all the tables and their columns along with their data types and the default values for that columns if any.
This can be fetched from the predefined system table INFORMATION_SCHEMA.COLUMNS. So i wrote the below script to get the columns along with the datatype.
After that in some cases i got confusion when the table name is same but the table belongs to different schemas. So i made corrections to query to fetch the schema name along with the table name and also i included the default value if any for the column.
The output will look like below.
In my previous article i have explained about Visual Studio Keyboard Shortcuts , How To get data from WEB API , How To Create Your First WEB API Project, Check Container Exists In Azure Blob , Convert Datatable To Json Data Array , How To Show Tooltip On Mouse Hover In Gridview and many articles in C#.Net,ASP.Net,VB.Net,Grid View,Javascript,jQuery,SQL Server and many other topics.
In some cases the developer need the columns of a table along with the datatype of that columns. I came across the situation to get all the tables and their columns along with their data types and the default values for that columns if any.
This can be fetched from the predefined system table INFORMATION_SCHEMA.COLUMNS. So i wrote the below script to get the columns along with the datatype.
SELECT TableName=Table_Name,
ColumnName=COLUMN_NAME,DataType=UPPER(DATA_TYPE)
FROM INFORMATION_SCHEMA.COLUMNS WHERE Table_Name='TagMaster'
After that in some cases i got confusion when the table name is same but the table belongs to different schemas. So i made corrections to query to fetch the schema name along with the table name and also i included the default value if any for the column.
SELECT TableName=Table_schema+'.'+Table_Name,
ColumnName=COLUMN_NAME,DataType=UPPER(DATA_TYPE)
+CASE WHEN CHARACTER_MAXIMUM_LENGTH IS NULL THEN
' ' ELSE '('+CONVERT(VARCHAR(5), CHARACTER_MAXIMUM_LENGTH)+') ' END
+CASE WHEN IS_NULLABLE='YES' THEN 'NULL ' ELSE 'NOT NULL ' END+CASE WHEN Column_Default IS
NULL THEN '' ELSE 'DEFAULT('+Column_Default+'),' END
FROM INFORMATION_SCHEMA.COLUMNS WHERE Table_Name='TagMaster'
The output will look like below.
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