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Character string values storage:
1. CHAR:
§ Stores strings of fixed length.
§ The length parameter s specifies the length of the strings.
§ If the string has smaller length it padded with space at the end
§ It will waste of a lot of disk space.
§ If the string has bigger length it truncated to the scale number of the string.
2. VARCHAR:
§ Stores strings of variable length.
§ The length parameter specifies the maximum length of the strings
§ It stores up to 2000 bytes of characters
§ It will occupy space for NULL values
§ The total length for strings is defined when database was created.
3. VARCHAR(2):
§ Stores strings of variable length.
§ The length parameter specifies the maximum length of the strings
§ It stores up to 4000 bytes of characters
§ It will not occupy space for NULL values
§ The total length of strings is defined when strings are given
What else can I help you with?
Difference between built in data type and user-defined datatype?
A built in data type is a framework's native data type. By default you'd probably have some built in generic data types, such as integer, string, boolean and so on. In the other hand sometimes you can extend the framework's data types, by programminga user-defined data type. In this data type you have to define it's behaviour and structure, and once defined, you can use it the same way you use the default data types. In PostgreSQL or Oracle, you can define data types. You can read about it on their webs.
What is the difference between serial robots and parallel robots?
series and parallel are different types of circuits that a robot can contain
What is the difference between C and C plus plus prototypes?
The only difference is that C does not use nor require prototypes. C++ does because all functions and types must at least be declared, if not defined, before they can be used.
Difference types of nonlinear data structure?
Tree, Graphs are the types of nonlinear data structure.
What is difference between fundamental and derived data types?
The simple is that fundamental quantities can be changed its not constant always and derived Quantities is like to constant always it could not be change ever.
Different between oracle datatypes char20 and varchar20?
In Oracle, the char(20) datatype is a fixed length character string. It will always use 20 characters in the block. If the value contained in the field is less than 20 characters, it will be padded on the right (or the left, depending on coding) with spaces. In Oracle, the varchar(20) datatype is a variable length character string. It will use betwen 1 and 21 characters in the block, 1 for the length, and 0-20 for the data. Its effective length can range between 0 and 20 characters. Note, however, that a string of length 0 is indistinguishable from a null value. This is a deviation from the SQL standard that Oracle acknowledges, but fixing it would break too much existing code. Note also that comparing a char against a varchar is problematic. With the trailiing spaces, the char is not the same as a varchar containing the same characters. Predicates involving these mixed types should use the rtrim expression on the char datatype. (Example: while rtrim(mycharvalue) = myvarcharvalue) Note also that varchar is obsolete. Current code should use varchar2, such as varchar2(20).
Explain the difference betwwen the two types of feeding?
explain the difference between the two types of feeding?
What are the Other database types instead of oracle?
MsSqlServer
What is the difference between the different types of emulsifying agents?
lecithin
Difference between different types of operating system?
fgfghgh
Difference between types of displacement addressing modes?
wewe
Can you call a java function from an oracle stored procedure?
The simple answer to this is yes. You can either build your java class on the server side machine and then load it up into Oracle using the loadjava command, which can also compile it if you so desire, or load it direct from PL/SQL using: create or replace and compile java source named <class name> AS ... and then the java code. e.g. ..... create or replace and compile java source named helloBob AS public class HelloBob { public static String hello() { return "Hello Bob!"; } public static String hello(String name) { return "Hello " + name + "!"; } } NOTE: There are performance improvements in loading it into Oracle as a compiled class. Once in Oracle, the the functions in this class can be called by defining it as a function or procedure... in the example featured two functions can be defeind as follows: CREATE OR REPLACE FUNCTION HelloBob RETURN VARCHAR2 IS LANGUAGE JAVA NAME 'HelloBob.hello() return String'; / CREATE OR REPLACE FUNCTION Hello(name VARCHAR2) RETURN VARCHAR2 IS LANGUAGE JAVA NAME 'HelloBob.hello(java.lang.String) return String'; / Note: Good programming practice is to put functions in a 'package' in Oracle... it makes them easier to roll out. You can now call these functions: e.g. select hellobob() AS "Greeting" FROM DUAL; should return a column "Greeting" with the value 'Hello Bob!' and... SELECT hello('Fred') AS "Greeting" FROM DUAL; should return a column "Greeting" with the value 'Hello Fred!' You can pass and return all types of Oracle variable, including collections.... see the oracle.sql package definition for more info. If you need to make database calls from the java function then use OracleDriver().defaultConnection() to get a connection (contained in the oracle.jdbc package).
In English Difference between various and different?
There's no signifigant difference between the two, each is used in certain contexts. "There are dozens of different dog types", versus, "there are various dog types."
Difference between the various types of fiber optic cables?
Nothing
What is the difference between a tragedy in itself and a tragedy of itself?
what is the tragedy and what is types of tragedy what is the tragedy and what is types of tragedy
What are different types of search engines?
Identify 5 types of search engines and explain the difference between
What are the different types of databases available?
sql db2 oracle mysql
