数据存在修改,不存在插入 merge法--适合与两张表的关联查询MERGEINTOtable_name alias1USING(table|view|sub_query) alias2ON(joincondition)WHENMATCHEDTHENUPDATEtable_nameSETcol1=col_val1WHENNOTMATCHEDTHENINSERT(column_list)VALUES(column_values);--例:mergeintoAccount t1using(select'3'AccountID,'肖文博'A...
WHERE{CURRENT OF cursor_name|search_condition} 例: DELCARE CURSOR c1 IS SELECT empno,salary FROM emp WHERE comm IS NULL FOR UPDATE OF comm; v_comm NUMBER(10,2); BEGIN FOR r1 IN c1 LOOP IF r1.salary<500 THEN v_comm:=r1.salary*0.25; ELSEIF r1.salary<1000 THEN v_comm:=r1.sala...
iii. – IF – THEN – ELSEIF – END IF 2、 条件语句语法 a) IF condition THEN i. Statement; b) [ELSIF condition THEN i. Statement;] c) [ELSE i. Statement;] d) ENDIF; 3、 DEMO: a) IF v_name = ‘SCOTT’ AND SAL >= 3000 THEN i. v_dept :=20; b) END IF; 代码语言:jav...
If the keyword appears after the first 4k, then no KWIC is shown. Stemming Expansion Oracle SES applies stemming to the query term. Stemming expands the term to other terms that share the same root. For example, [banks] returns documents containing the word banks, banking, or bank. Oracle...
If you want to find all the exam results with A or B grades, you can place theselectabove in a subquery. Then filter it in the outer query. Or you can slap thecaseexpression directly in thewhereclause, like so: Using columns incaseexpressions like this limits the optimizer’s ability...
ELSIF (event in ('PRE-RECORD', 'POST-QUERY')) THEN -- etc. ELSE fnd_message.debug('Invalid event passed to item_name: ' || EVENT); END IF; END ITEM_NAME; Tip:Remember that writing an item handler is not the whole process; you also must code a trigger for each event that the...
1 查询语句 查看账户下的所有表 1 select * from tab; 查看账户下的所有表的详细信息 1 select * from user_tables; 1.1 select select 用于从数据看查询数据...语法: 1 select field1,filed2,.. . 2 from tablename 3 [where condition]; 利用 Oracle 数据库 Scott 账户下的 EMP 表进行练习...1 -...
Check for the variable, to decide the error condition, when running the query. REPEAT stmts..; UNTIL not_found END REPEAT; 14) If you have Oracle cursor with the FOR loop You can change it thus i) First declare a Boolean - DECLARE done BOOL DEFAULT FALSE; ...
使用oracle作为数据源,生成的sql 别名以"_"开头,会报ORA00911无效字符,如何解决的?谢谢!是否可将字段别名前缀通过BeanSearcherProperties中添加配置实现?并...
After a few minutes, check if everything works as expected; that is, verify that the stock data is being collected and saved to the database. A quick way to check is to use the SQL command-line tool, connect to the database asdjangousr, and issue the following SQL query: ...