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scrript to convert datatypes of multiple columns

By ashwin rajiv,

generates an runs a select statement to convert all th olumns of a certain datatype in apirticular table to another datatype
eg all columns of type int to varchar etc

the sp takes three parameters namely the table name, source data type and detination data type

generates a select query ad executes it

eg: exec ConvertTableTypes 'ledgerjournaltrans','uniqueidentifier','varchar(36)'

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