SQL/MX 2.x Reference Manual (H06.04+)

SQL/MX Functions and Expressions

HP NonStop SQL/MX Reference Manual—540440-003

9-92

Examples of MOVINGMAX

Suppose that SEQFCN has been created as:

CREATE TABLE $db.mining.seqfcn

(I1 INTEGER,TS TIMESTAMP);

Within MXCI, the ANSI alias name has been mapped as:

CREATE SQLMP ALIAS db.mining.seqfcn $db.mining.seqfcn;

The table SEQFCN has columns I1 and TS with data that is sequenced by column TS:

•

Return the maximum of nonnull values of a column in the current window of three

rows:

SELECT MOVINGMAX (I1,3) AS MOVINGMAX3

FROM mining.seqfcn

SEQUENCE BY TS;

MOVINGMAX3

------------

6215

28174

11966

--- 5 row(s) selected.

I1 TS

6215 TIMESTAMP '1950-03-05 08:32:09'

28174 TIMESTAMP '1951-02-15 14:35:49'

null TIMESTAMP '1955-05-18 08:40:10'

4597 TIMESTAMP '1960-09-19 14:40:39'

11966 TIMESTAMP '1964-05-01 16:41:02'