Data dictionary Microsoft™ SQL Server related data dictionary topics. Data type conversion table: Informix to SQL ServerBOOLEAN data typeCHAR and VARCHAR data typesNumeric data typesDATE and DATETIME data typesINTERVAL data typeSERIAL and BIGSERIAL data typesSQL Server UNIQUEIDENTIFIER data typeSQL Server ROWVERSION data typeROWID columnsCase sensitivityTEXT and BYTE (LOB) typesTable constraintsName resolution of SQL objects