Syntax: variable_name type-attribute%TYPE in Java Assign barcode code 128 in Java Syntax: variable_name type-attribute%TYPE

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Syntax: variable_name type-attribute%TYPE using barcode printing for none control to generate, create none image in none applications. iOS The type is a direct reference to a database column. Lab 2.1 Exercises FOR EXAMPLE -- ch02_2a.sq l SET SERVEROUTPUT ON DECLARE v_name student.first_name%TYPE; v_grade grade.

numeric_grade%TYPE; BEGIN DBMS_OUTPUT.PUT_LINE(NVL(v_name, "No Name "). " has grade of ". NVL(v_grade, 0)); END; A) In this example, what is declared State the datatype and value. ANSWER: The variable v_name is declared with the identical datatype as the column first_name from the database table STUDENT. In other words, the v_name variable is defined as VARCHAR2(25).

Additionally, the variable v_grade is declared with the identical datatype as the column grade_numeric from the database table GRADE . That is to say, the v_grade_numeric variable is defined as NUMBER(3). Each variable has a value of NULL.

. THE MOST COMM none none ON DATATYPES When you re a programmer, it is important to know the major datatypes that you can use in a programming language. They determine the various options you have when solving a programmatic problem. Also, you need to keep in mind that some functions work on only certain datatypes.

The following are the major datatypes in Oracle that you can use in your PL/SQL: VARCHAR2(maximum_length). . Stores vari able-length character data. .

Takes a required parameter that specifies a maximum length up to 32,767 bytes. . Does not use a constant or variable to specify the maximum length; an integer literal must be used.

. The maximum width of a VARCHAR2 database column is 4,000 bytes..

CHAR[(maximum_length)]. . Stores fixe d-length (blank-padded if necessary) character data. .

Takes an optional parameter that specifies a maximum length up to 32,767 bytes. . Does not use a constant or variable to specify the maximum length; an integer literal must be used.

If the maximum length is not specified, it defaults to 1. . The maximum width of a CHAR database column is 2,000 bytes; the default is 1 byte.

. NUMBER[(precision, scale)]. . Stores fixe d or floating-point numbers of virtually any size. .

The precision is the total number of digits. . The scale determines where rounding occurs.

. It is possible to specify precision and omit scale, in which case scale is 0 and only integers are allowed..

Lab 2.1 Exercises . Constants o r variables cannot be used to specify the precision and scale; integer literals must be used. .

The maximum precision of a NUMBER value is 38 decimal digits. . The scale can range from 0 to 127.

For instance, a scale of 2 rounds to the nearest hundredth (3.456 becomes 3.46).

. The scale can be negative, which causes rounding to the left of the decimal point. For.

example, a sc none for none ale of 3 rounds to the nearest thousandth (3,456 becomes 3,000). A scale of 0 rounds to the nearest whole number. If you do not specify the scale, it defaults to 0.

BINARY_INTEGER. . Stores sign ed integer variables. .

Compares to the NUMBER datatype. BINARY_INTEGER variables are stored in binary format, which takes up less space. .

Calculations are faster. . Can store any integer value in the range 2,147,483,747 to 2,147,483,747.

. This datatype is used primarily to index a PL/SQL table. This is explained in more depth.

in 15, Collections. You cannot create a column in a regular table of binary_integer type. DATE . Stores fixe d-length date values. .

Valid dates for DATE variables are January 1, 4712 BC to December 31, 9999 AD. . When stored in a database column, date values include the time of day in seconds since midnight.

The date portion defaults to the first day of the current month; the time portion defaults to midnight. . Dates are actually stored in binary format and are displayed according to the default format.

. TIMESTAMP . This dataty pe is an extension of the DATE datatype. It stores fixed-length date values with a precision down to a fraction of a second, with up to nine places after the decimal (the default is six).

An example of the default for this datatype is 12-JAN-2008 09.51.44.

000000 PM. . The WITH TIME ZONE or WITH LOCAL TIME ZONE option allows the TIMESTAMP to be related.

to a particul none none ar time zone. Then this is adjusted to the time zone of the database. For example, this would allow a global database to have an entry in London and New York recorded as being the same time, even though it would be displayed as noon in New York and 5 p.

m. in London. BOOLEAN.

. Stores the values TRUE and FALSE and the nonvalue NULL. Recall that NULL stands for a missing, unknown, or inapplicable value.

. Only the values TRUE and FALSE and the nonvalue NULL can be assigned to a BOOLEAN variable. .

The values TRUE and FALSE cannot be inserted into a database column..
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