Create tables based on the rows value in a table in sql - sql

Question

My requirement is some thing like this
I have a table tblDetails which contains all the details about the table
TblCol TblName ColNo ColName Type Length Sacle KeyType description
Now based on values in tblDetails I want to create the tables.

Answer 1

Here is a (very) basic example of how to approach this sort of dynamic SQL. This example does not add indexes, keys, or anything fancy - just some tables and columns with datatypes, but it should get you started in the right direction:
DECLARE #sql NVARCHAR(MAX)
DECLARE #tblName nvarchar(255)
DECLARE tbl_cursor CURSOR LOCAL FOR
SELECT DISTINCT tblName
FROM tblDetails
ORDER BY tblName
OPEN tbl_cursor
FETCH NEXT FROM tbl_cursor INTO #tblName
--OUTER LOOP THROUGH TABLES:
WHILE ##FETCH_STATUS = 0
BEGIN
SET #sql = 'CREATE TABLE ' + #tblName + '( ';
DECLARE #colName nvarchar(255),
#type nvarchar(50),
#length nvarchar(50),
#ctr int = 0;
DECLARE col_cursor CURSOR LOCAL FOR
SELECT [colName], [Type], [Length]
FROM tblDetails
WHERE tblName = #tblName
ORDER BY ColNo
OPEN col_cursor
FETCH NEXT FROM col_cursor INTO #colName, #type, #length
--INNER LOOP THROUGH COLUMNS
WHILE ##FETCH_STATUS = 0
BEGIN
IF #ctr != 0 --if this is not the first column, prefix w/ comma
SET #sql += ', ';
SET #sql += '[' + #colName + '] ' + #type;
IF #type IN ('CHAR','VARCHAR','NCHAR','NVARCHAR','BINARY','VARBINARY') --add size if appropriate
SET #sql += '(' + #length + ')'
SET #ctr += 1;
FETCH NEXT FROM col_cursor INTO #colName, #type, #length
END --inner loop
CLOSE col_cursor
SET #sql += ')';
EXECUTE sp_executesql #sql
FETCH NEXT FROM tbl_cursor INTO #tblName
END --outer loop
CLOSE tbl_cursor