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ORDER BY clause, 176
SAMPLE statement, cluster sampling, 320
updating rows, 200
Persistent sample tables, 207
PI function
examples of, 439
syntax diagram of, 439
POPULATE INDEX utility
considerations for, 220
examples of, 221
syntax diagram of, 220
POSITION function
examples of, 440
result of, 440
syntax diagram of, 440
POWER function
examples of, 441
syntax diagram of, 441
Precision, description of, 266
Predicates
summary of, 286
BETWEEN, 286
comparison, 287
description of, 286
EXISTS, 291
IN, 292
LIKE, 294
NULL, 296
quantified comparison, 297
PREPARE statement
availability, 154
considerations for, 154
examples of, 154
syntax diagram of, 154
PRIMARY KEY constraint, 237
Primary key, description of, 273
Privileges
GRANT EXECUTE statement use of, 138
GRANT SCHEMA statement use of, 140
GRANT statement use of, 136
on schemas and synonyms, 142
on views, 137
REVOKE EXECUTE statement use of, 158
REVOKE SCHEMA statement use of, 160
REVOKE statement use of, 156
PURGEDATA utility
considerations for, 222
example of, 223
syntax diagram of, 222
Q
Quantified comparison predicates
ALL, ANY, SOME, 298
examples of, 298
operand requirements, 298
result of, 298
syntax diagram of, 297
QUARTER function
examples of, 442
syntax diagram of, 442
Query execution plan
displayed, 124
in running query, 125
operators, 124
reviewing, 124
Query expression
SELECT statement use of, 167
Query specification
SELECT statement use of, 170
simple table, form of , 170
R
RADIANS function
examples of, 443
syntax diagram of, 443
RANK window function
examples of, 502
syntax diagram of, 502
RANK/RUNNINGRANK function
example for, 444
syntax diagram of, 444
READ COMMITTED, 25
READ UNCOMMITTED, 25
REAL data type, 254
Recalibrating the current value
ALTER TABLE statement, 49
CREATE TABLE LIKE, 83
example of, 83
RECOMPUTE materialized views, 65, 281
Referential integrity
FOREIGN KEY constraint, 46, 47, 77, 237
RENAME TO clause, 47
Renaming tables, 47
REPEAT function
examples of, 447
syntax diagram of, 447
REPEATABLE READ
and SERIALIZABLE, 25
description of, 33
REPLACE function
examples of, 448
syntax diagram of, 448
REPLICATE command
and SPJs, 228
and views, 228
authorization, 229
considerations for, 226
description of, 225
entire schema, 226
examples, 230
larger to smaller system, 227
locking, 228
multiple tables, 227
restrictions, 229
semantic actions, 228
single-table replication, 227
smaller to larger system, 227
statistics, 228
545
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