Summary: in this tutorial, you will learn how to use the PL/pgSQL select into statement to select data from the database and assign it to a variable. Introduction to PL/pgSQL Select Into statement The select int
Introduction to PL/SQL SELECT INTO statement# PL/SQLSELECT INTOstatement is the simplest and fastest way to fetch a single row from a table intovariables. Here’s the syntax of the PL/SQLSELECT INTOstatement: SELECTselect_listINTOvariable_listFROMtable_nameWHEREcondition;Code language:PostgreSQL S...
PL/SQL stands for "Procedural Language Extension of SQL". PL/SQL uses a block-structured syntax. Each of the logical blocks of PL/SQL can be nested into any number of subblocks.This section contains the PL/SQL MCQs on various topics such as Variables, Constants, Literals, Case, Loop, ...
考虑下面的SQL语句: -- 建表 create table t1(id int); -- 插入 insert into t1 values(1),(2),(3); -- 查询 select * from t1 where id = 1; 1. 2. 3. 4. 5. 6. 对于select语句,由于我们并没有为t1表创建索引,所以只能通过全表遍历的方式来执行查询。全表遍历会遍历表的所有块,逐条获取...
A SELECT INTO statement with the optional BULK COLLECT keywords preceding the INTO keyword retrieves multiple rows into an array. Syntax BULK COLLECT INTO ,array-variable LIMITexpression Description BULK COLLECT INTO array-variable Identifies one or more variables with an array data type. Each row...
Using Identifiers in PL/SQL Assigning Values to a Variable With the Assignment Operator Using Literals Declaring Variables With the DEFAULT Keyword or NOT NULL Constraint Assigning Values to a Variable With the PL/SQL SELECT INTO Statement Using %TYPE and %ROWTYPE Attributes to Declare Ident...
The SQL Window and Report Window now support multi-select substitution variables that allow you execute queries with set expressions: The selector can either display the actual values or a description of the values. The screenshot above shows the department names and includes the selected department...
1.2.2SELECT Statements that Reference Collections TheBULK COLLECT INTO clause can improve the performance of queries that reference collections. You can use BULK COLLECT INTO with tables of scalar values, or tables of %TYPE values. The PL/SQL block inExample 6-10queries multiple values into PL/...
SQL> SELECT distinct type FROMALL_PLSQL_OBJECT_SETTINGS; TYPE --- PROCEDURE PACKAGE PACKAGE BODY TYPE BODY TRIGGER FUNCTION TYPE 7 rows selected. Table 1-2 PL/SQL Compilation Parameters --PL/SQL 相关的编译参数: Note: The compilerparameter PLSQL_DEBUG, which specifies whether to compile PL/...
SQL> SELECT distinct type FROMALL_PLSQL_OBJECT_SETTINGS; TYPE --- PROCEDURE PACKAGE PACKAGE BODY TYPE BODY TRIGGER FUNCTION TYPE 7 rows selected. Table 1-2 PL/SQL Compilation Parameters --PL/SQL 相关的编译参数: Note: The compilerparameter PLSQL_DEBUG, which specifies whether to compile PL/...