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examples of, 386
syntax diagram of, 386
DATEADD function
examples of, 381
syntax diagram of, 381
DATEDIFF function
examples of, 382
syntax diagram of, 382
DATEFORMAT function
examples of, 383
syntax diagram of, 383
Datetime data types
DATE, 250
description of, 250
examples of literals, 276
TIME, 250
TIMESTAMP, 250
Datetime functions
summary of, 339
ADD_MONTHS, 346
CONVERTTIMESTAMP, 368
CURRENT, 373
CURRENT_DATE, 374
CURRENT_TIME, 376
CURRENT_TIMESTAMP, 377
DATE_ADD, 379
DATE_PART (interval), 384
DATE_PART (timestamp), 385
DATE_SUB, 380
DATE_TRUNC, 386
DATEADD, 381
DATEDIFF, 382
DATEFORMAT, 383
DAY, 387
DAYNAME, 388
DAYOFMONTH, 389
DAYOFWEEK, 390
DAYOFYEAR, 391
EXTRACT, 404
HOUR, 406
JULIANTIMESTAMP, 409
MINUTE, 421
MONTH, 423
MONTHNAME, 424
QUARTER, 442
SECOND, 463
TIMESTAMPADD, 477
TIMESTAMPDIFF, 478
WEEK, 487
YEAR, 488
Datetime literals
description of, 276
Datetime value expression
examples of, 258
syntax diagram of, 257
DAY function
examples of, 387
syntax diagram of, 387
DAYNAME function
examples of, 388
syntax diagram of, 388
DAYOFMONTH function
examples of, 389
syntax diagram of, 389
DAYOFWEEK function
examples of, 390
syntax diagram of, 390
DAYOFYEAR function
examples of, 391
syntax diagram of, 391
DDL statements (see Data Definition Language (DDL)
statements)
DECIMAL data type, 253
DECODE function
examples of, 393
syntax diagram of, 392
DEFAULT clause
ALTER TABLE use of, 45
CREATE TABLE use of, 76, 314
examples of, 315
syntax diagram of, 314
DEFAULT value, using, 199
DEGREES function
examples of, 395
syntax diagram of, 395
DELETE statement
access options, 109
authorization requirements, 110
considerations for, 110
examples of, 111
isolation levels, 110
long running delete, 110
SET ON ROLLBACK clause, 109
SKIP CONFLICT access, 110
STREAM clause, 109, 199
syntax diagram of, 108
WHERE clause, 109
Delimited identifiers, 269
DENSE_RANK window function
examples of, 497
syntax diagram of, 497
Derived column names
examples of, 236
syntax of, 235
DETAIL_COST in EXPLAIN output
CPU_TIME, 131, 403
IDLETIME, 131, 403
IO_TIME, 131, 403
MSG_TIME, 131, 403
PROBES, 131, 403
DIFF1 function
equivalent definitions, 396
examples of, 396
syntax diagram of, 396
DIFF2 function
equivalent definitions, 398
examples of, 398
syntax diagram of, 398
539
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