CASE Statement This Oracle tutorial explains how to use the Oracle/PLSQLCASE statementwith syntax and examples. Description The Oracle/PLSQL CASE statement has the functionality of an IF-THEN-ELSE statement. Starting in Oracle 9i, you can use the CASE statement within a SQL statement. Syntax Th...
The searchedCASEstatement has the following syntax: The searchedCASEexpression evaluates the Boolean expression (e1, e2, …) in eachWHENclause in the order that the Boolean expressions appear. It returns the result expression (r) of the first Boolean expression (e) that evaluates to true. ...
DECODE is considered one of the most powerful functions in Oracle, but the Oracle CASE statement is even better. The Oracle 8i release introduced the CASE expression. The Oracle CASE statements can do all that DECODE does plus lot of other things including IF-THEN analysis, use of any compari...
如何使用 Oracle Case Statement 测试不等式问题描述 投票:0回答:3这很好用: select case (1+2) -- (or_some_more_complicated_formula_yielding_a_numeric_result) when 200 then '200' when 100 then '100' else 'other' end hi_med_low from dual ; 但我需要做更多这样的事情: select case (1+...
case when <condition> then <value> when <condition> then <value> ... else <value> end Examples The following examples will make the use of CASE expression more clear. E.g.: Returning categories based on the salary of the employee. ...
public CaseStatement.WhenThen() CaseStatement.WhenThenpublic CaseStatement.WhenThen(SQLFragment condition, SQLFragment result) ... WHEN condition THEN result ...Method DetailsetWhenExpressionpublic void setWhenExpression(SQLFragment whenExpression) get...
Statement Case 1: row Case 1: table Case 2: row Case 2: table Case 3: row Case 3: table SELECT - - - S - S INSERT X SRX X RX X SRX UPDATE X SRX X SRX X SRX DELETE X SRX X SRX X SRX SELECT...FOR UPDATE X RS X S X S LOCK TABLE... IN.. - - - - - ...
To facilitate the conversion of LONG datatypes to LOBs, Oracle9i included support for LOBs in most functions that support LONGs, as well as an option to the ALTER TABLE statement that allows the automatic migration of LONG datatypes to LOBs. BFILE The BFILE datatype acts as a pointer to a ...
In this statement: First, specify the name of the tablespace after theCREATE TABLESPACEkeywords. In this example, the tablespace name istbs1. Second, specify the path to the data file of the tablespace in theDATAFILEclause. In this case, it istbs1.dbf. Note that you can use the datafile...
CASE statements are discussed in the next chapter. Lab 4.1 IF Statements LAB OBJECTIVES After completing this lab, you will be able to Use the IF-THEN statement Use the IF-THEN-ELSE statement An IF statement has two forms: IF-THEN and IF-THEN-ELSE. An IF-THEN statement allows you to ...