What is the average annual salary for Field Superintendent-Construction? The annual salary for someone with the job title Field Superintendent-Construction may vary depending on a number of factors including industry, company size, location, years of experience and level of education.he annual salary for someone with the job title Field Superintendent-Construction may vary depending on a number of factors including industry, company size, location, years of experience and level of education.
VARCHAR : when u r using this data type what ever size u r giving that much of memory is allocated to that variable. suppose u r giving varcahr(20) then u enter only 15 cahracters of that variable then also it is giving memory of 20 cahracters.VARCHAR2: when u r using this data type the memory allocation is different.
All replies. 1  The main difference between these 2 data types is that an NCHAR data type is fixed-length while an NVARCHAR is variable-length. 2  Farhan, Thank you for your reply. 3  Martin, According to documentation. 4  Farnhan, You mean a mix up with the documentation, I presume.