The CASE statement can be used in the following versions of Oracle/PLSQL: Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i Example The CASE statement can be used in Oracle/PLSQL. You could use the CASE statement in a SQL statement as follows: (includes theexpressionclause) SELECT table_name...
In this example, if the deptno column has a 10 in it, the SQL query will return the value accounting rather than the number 10. If the deptno is not 10, 20, 30, or 40, then the CASE statement will fall through to the ELSE clause, which will return unassigned. Note that with a s...
SQL> create table emp1 as select * from emp where 1=2; SQL> insert into emp1 select * from emp; 传统方式数据 SQL> insert /*+ APPEND */ into emp1 select * from emp; 直接方式数据,必须commit后才能查看数据 【实验】直接路径插入数据 SQL>createtableemp1asselect*fromempwhere1=2; SQL>ins...
Searched CASE expression example# When you use the searchedCASEexpression within aSELECTstatement, you can replace values in the result based on comparison values. The following example uses the searchedCASEexpression to classify the products based on their list prices: ...
In this statement: First, specify the name of the tablespace after the CREATE TABLESPACE keywords. In this example, the tablespace name is tbs1. Second, specify the path to the data file of the tablespace in the DATAFILE clause. In this case, it is tbs1.dbf. Note that you can use the...
There’s noifkeyword in SQL. If you want to doif-else-thenlogic inselect,whereor anywhere else in a statement, you need acaseexpression. This is a series ofwhenclauses that thedatabaseruns in order: For example, if you want to map exam correct percentages to grade letters according...
CASE expression syntax is similar to an IF-THEN-ELSE statement. Oracle checks each condition starting from the first condition (left to right). When a particular condition is satisfied (WHEN part) the expression returns the tagged value (THEN part). If none of the conditions are matched, the...
For example: INSERT INTO suppliers (supplier_id, supplier_name) SELECT account_no, name FROM customers WHERE customer_id > 5000; By placing a SELECT statement within the INSERT statement, you can perform multiples inserts quickly. With this type of insert, you may wish to check for the numbe...
dbkedDefDump():Starting a non-incident diagnosticdump(flags=0x0,level=3,mask=0x0)---Error Stack Dump---CurrentSQLStatementforthissession(sql_id=0wjycn5zghkkh)---select*from err 4.3 Call Stack 这里为一些内存里面的内容,看不懂~ 一般为Oracle官方或...
This tutorial explains how to create a parameterized view using SQL Macros. The examples use the built-in sales history schema so there are no setup steps. Script Simple Explain Plan This script explains the plan for a query of the sh.sales and sh.products tables. Both statements must be ...