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Example of constructing an arithmetic expression:
An arithmetic expression may be proceeded by a + or - sign. These operations are known as unary + or unary - operators.
Illustrations of the valid arithmetic expressions are:
Note that whenever the right-hand side of a COMPUTE verb is a single identifier or literal, then the effect is that of a MOVE statement.
Illustration:
COMPUTE A = B + C
has similar effect as that of the ADD B C GIVING A
COMPUTE F = 1.8 * C + 32
The value of the expression on the right-hand side is computed and this value is then moved to the F. Assume that the C & F are defined with pictures 99 & ZZ9.9 respectively and the present value of C is 3. Subsequently after the execution of the statement, the F will have the value 37.4.
RULES FOR INDEXED TABLES: The rules of indexing a table with an INDEXED phrase are as shown below: (1) If indexing is completed for any one level of a table, then indexing
READ STATEMENTS: The common format for the read statements is as shown bellow. Format 1: READ file-name RECORD [ INTO identifier ] [ ; AT END imperative-s
Comparison of Nonnumeric Operands: A nonnumeric operand can be compared to the other nonnumeric operand according to the rules as shown below: (i) Fields of Equal Sizes:
Can u please let me know how can i use SSA''s in IMS while fetching segments. Thanks, Rajesh
ADD and SUBTRACT CORRESPONDING: The CORRESPONDING option can also used with the ADD and SUBTRACT verbs. The following are some of the formats of these verbs with the CORRESPON
SEQUENTIAL FILES WITH THE VARIABLE-LENGTH RECORDS: The Magnetic - tape or disk files can hold variable-length records. In this situation the file can have records with various
Illustration of Multiply verb: (a) MULTIPLY A BY B. In this situation the value of A & B will be multiplied and the product will be stored in B. The decimal point locatio
Comparing features of oracle rdbms with Mysql
ON SIZE ERROR OPTION: If after an arithmetic expression, the result exceeds the highest value which can be accommodated in the result; this error is termed as size error. T
READ STATEMENT: The aim of this verb is to make available the next logical record from the input file. It is important to note the meaning of the "next" logical record in the
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