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.
Char vs Varchar. Char and varchar are the most highly used character data type available in databases. Char is used to store a string with a fixed length while varchar is used to store strings that have a varying length. In order to get a better performance from the data, it is more important to choose the correct data types for the fields of the tables in your database.