Webb8 Answers Sorted by: 151 You can simply handle the NO_DATA_FOUND exception by setting your variable to NULL. This way, only one query is required. v_column my_table.column%TYPE; BEGIN BEGIN select column into v_column from my_table … Webb30 nov. 2024 · NULL値を持つデータのSELECTを行うには、 IS NULL 、または IS NOT NULL を使用します。 IS NULLの使い方 NULLであるデータをselectするには IS NULL を …
PL/SQLの例外処理(後編):超入門「PL/SQL」(9)(1/2 ペー …
Webb27 sep. 2013 · Заказы. Парсер данных по запросу. 3000 руб./за проект3 отклика18 просмотров. Собрать данные, парсер для базы исследования по земельным … WebbThe PL/ SQL is the easiest, fastest and simplest way of fetching the data of a single row into a variable. The syntax of PL/ SQL SELECT INTO statement used for retrieving the … kpop haircuts for boys
[ Oracle PL/SQL ] SELECT INTO でレコード数なし
Webb8 dec. 2024 · Moving on to PL/SQL, a variable's value can be null unless you declared that variable with a NOT NULL constraint or use the CONSTANT keyword to define your … WebbTake note that The Doors of Stone (id 5) is unpublished and therefore the published_date is NULL.Similarly, Beowulf (id 6) – the famous Old English epic poem – has no known … Webb6 apr. 2024 · 1、流程控制语句. 可以控制程序执行的流程,包括如下三类:. 1、控制语句:if 语句. 2、循环语句:loop 语句,exit 语句. 3、顺序语句:goto 语句,null 语句. man with cpap