INSERT INTO "TESTAGG" (A, B, C) VALUES ('3', 'B6','C6') 3.3、wm_concat()用法 select a,wm_concat(b|| '(' || c || ')') as bc from testagg group by a order by a 1 <CLOB>--B1(C1),B2(C2),B3(C3) 2 <CLOB>--B4(C4),B5(C5) 3 <CLOB>--B6(C6) 若要转化成stri...
LISTAGG operates on all rows and returns a single output row. ■ As a group-set aggregate, the function operates on and returns an output row for each group defined by the GROUP
项目设置(转换)(OracleToSQL) “项目设置”对话框的“转换”页面包含一些设置,用来自定义 SSMA 如何将 Oracle 语法转换为 SQL Server 语法。 “项目设置”和“默认项目设置”对话框中提供了“转换”窗格: 要指定用于所有 SSMA 项目的设置,请在“工具”菜单上单击“默认项目设置”,从“迁移目标版本”下拉列表中选择...
1.INSERT (往数据表里插入记录的语句) INSERT INTO 表名(字段名1, 字段名2, ……) VALUES ( 值1, 值2, ……); INSERT INTO 表名(字段名1, 字段名2, ……) SELECT (字段名1, 字段名2, ……) FROM 另外的表名; 字符串类型的字段值必须用单引号括起来, 例如: ’GOOD DAY’ 如果字段值里包含单...
optimizer_mode string ALL_ROWS select * from v$parameter where name='optimizer_mode' SQL> alter session set optimizer_mode='RULE'; Oracle的hint可以直接影响优化器解析目标sql产生执行计划 Hint:可以影响目标sql是否能够被查询改写,merge,unnest,use_concat等 ...
Too_many_rows:select …into语句匹配多个行 Zero_Divide:被零除 Value_error:算数或转换错误 Timeout_on_resource:在等待资源时发生超时 示例:被0除 declare pnum number; begin pnum := 1/0; exception when zero_divide then dbms_output.put_line('1: 0不能做分母'); dbms_output.put_line('2: 0不...
--s声明变量,记录一行数据 vrow emp%rowtype; begin --1.打开游标 open vrows; --2.从游标提取数据 --循环取数据 loop fetch vrows into vrow; exit when vrows%notfound; dbms_output.put_line('姓名:'||vrow.ename ||' 工资: ' || vrow.sal); end loop; --3.关闭游标 close vrows; end...
You want to perform string concatenation as a comma delimited text in oracle. Solution: Oracle has few methods to perform string aggregation. The most common usuage you popularly find on internet is to convert multiple rows to a single row with a delimiter. Starting Oracle version 11.2, a new...
3. CONCAT 连接两个字符串; SQL> select concat(010-,88888888)||转23 高乾竞电话 from dual; 高乾竞电话 --- 010-88888888转23 4. INITCAP 返回字符串并将字符串的第一个字母变为大写; SQL> select initcap(smith) upp from dual; UPP --- Smith 5....
3rowsselected. WM_CONCAT内建函数 如果你的Oracle不是11gRelease2,但是支持WM_CONCAT函数,那么解决上面的问题同样是小菜一碟,使用WM_CONCAT函数G如下: COLUMNemployeesFORMATA50 SELECTdeptno,wm_concat(ename)ASemployees FROMemp GROUPBYdeptno; DEPTNOEMPLOYEES --- 10CLARK,KING,MILLER 20SMITH,FORD,ADAMS,SCOTT,JONE...