ElenaD25 / Dynamic-SQL-Select

Retrieve records from a table using dynamic SQL (no need to write the columns name in the sp)

Select records from table without writing the columns names 🎯

This stored procedure helps to retrieve the records from a table without writing columns names inside the stored procedure.

How it was made 🎥

• create the procedure and give it a name
• integrate some checks to make sure the schema and table name were provided; if one of these two parameters haven't been provided the store procedure will return a message
• start composing the cursor which will go through the system table (INFORMATION_SCHEMA.COLUMNS); it will take the columns name based on the schema and table name that we send using the stored procedure parameters
• inside the cursor i will add each column name to the variable that will contains the whole select statement (@qry)
• after the cursor was closed and deallocated i add the from and where clause
• in the end i execute the @qry variable which contains the select statement

Execution syntax 👩‍💻

exec SP_Dynamic_Select @schema_name = 'your schema name', @table='your table name', @column_n = 'your column name', @value = 'your value'(based on this you'll retrieve specific records)

Update 📢

Changes:
- added the error handling part
- integrated binding params to protect the db against SQL Injection
- used the trim function to ensure data consistency and correctness & quotename for replacing square brackets and beautifying the code

!! This stored procedure can only be used if you want to retrieve all the columns in a table !! ‼ For those who want to run this sp on older versions of SQL Server, replace the trim function with a combination of ltrim and rtrim functions (example: ltrim(rtrim(column_name)) ); If you have permission, update the db compatibility level to 130 and you can forget about the above combination 😉

!! This stored procedure can only be used if you want to retrieve all the columns in a table !!