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...
Case Statement 相当于一组IF…THEN…ELSE…END IF语句,不需要返回值,只是在条件匹配的时候执行某种操作而已,所以在每个WHEN…THEN之后需要有一个分号,表示一条执行语句! CASE {variable or expression} WHEN {value} THEN {one or more operations};[WHEN..THEN] ELSE {default operation};ENDCASE; CASE WHEN ...
You can use aCASEexpression in any statement or clause that accepts a valid expression. For example, you can use theCASEexpression in statements such asSELECT,UPDATE, orDELETE, and in clauses likeSELECT,WHERE,HAVING, andORDDER BY. OracleCASEexpression has two formats: the simpleCASEexpression ...
Simple CASE statement example The following example compares single value (c_grade) with many possible values ‘A’, ‘B’,’C’,’D’, and ‘F’: DECLARE c_grade CHAR( 1 ); c_rank VARCHAR2( 20 ); BEGIN c_grade := 'B'; CASE c_grade WHEN 'A' THEN c_rank := 'Excellent' ...
position or by keywords.An exampleofthe formercaseis 'sqlldr scott/tiger foo'; an example of the latter is 'sqlldr control=foo userid=scott/tiger'.One may specify parameters by position before but not after parameters specified by keywords.For example,'sqlldr scott/tiger control=foo logfile=lo...
public CaseStatement.WhenThen() CaseStatement.WhenThenpublic CaseStatement.WhenThen(SQLFragment condition, SQLFragment result) ... WHEN condition THEN result ...Method DetailsetWhenExpressionpublic void setWhenExpression(SQLFragment whenExpression) get...
This use case lets a user view a summary of account and service charges on a statement for the selected account. Main Path for Viewing a Statement Account Summary The main path occurs when a user clicks Statement, then clicks Account to display the Account Summary page for the selected accou...
You complete them withend case(instead of justend) Eachthen/elseclause contains a statement, rather than returning a value For example, you could write a statement that assigns grade letters and pass/fail outcomes to variables: Functionally these are similar to a series if-elsif statements in...
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...
When requesting the entire result set, do it sparingly and in very specific use cases. For example, when you want to approximate a file download for the contents of an entire table. But even in this case, we recommend you exercise extreme caution. If possible, paginate with larger page siz...