sql SELECT * FROM your_table WHERE UPPER(column1) = 'ABC'; 三、使用DECODE函数进行字符串比较 Oracle的DECODE函数也可以用来比较字符串并根据比较结果返回相应的值。例如: sql SELECT DECODE(column1, 'your_string', 'They are equal', 'Not equal') AS Result FROM your_table; 在这个例子中,如果colum...
java.sql.SQLIntegrityConstraintViolationException: ORA-00001: unique constraint (USR_JXZX_DSJKF_MODEL.SYS_C001362707) violated 主键不一致,须联系数据中心修改 经DataX智能分析,该任务最可能的错误原因是: com.alibaba.datax.common.exception.DataXException: Code:[Framework-14], Description:[DataX传输脏数据...
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 :优化器对执行路径的选择,full,index等 :对表连...
SQL> shutdown immediate; ORA-01507: database not mounted ORACLE instance shut down. SQL> startup nomount pfile='/home/oracle/cdbp_pfile.ora'; ORACLE instance started. Total System Global Area 6878655632 bytes Fixed Size 9163920 bytes Variable Size 1627389952 bytes Database Buffers 5200936960 bytes...
单击Start > All Programs > Oracle-OraDB102 > Application Development > SQL Plus。 使用以下凭证登录,然后单击 OK: User Name: sh Password: sh Host String: orcl 2. 在Oracle SQL*Plus 中的 SQL > 提示符下输入以下字符串以运行批处理 sql 文件: start <InstallDrive>\oraclebi\server\schema\sajobs...
- Provide some basic automatic conversion of PLSQL code to PLPGSQL. - Works on any platform. - Export Oracle tables as foreign data wrapper tables. - Export materialized view. - Show a report of an Oracle database content. - Migration cost assessment of an Oracle database. - Migration ...
<isEmpty> 判断Collection.size<1或String.length()<1 <isEqual> 等于 <isNotEqual> 不等于 <isGreaterThan> 大于 <isGreaterEqual> 大于等于 <isLessThan> 小于 <isLessEqual> 小于等于 举个例子,我有个开始时间 startTime 和一个结束时间endTime 我想查询所输入的startTime 和endTime之间的时间段的所有数据...
(); builder =newStringBuilder(" from ") .append(resolveTables(beanMeta.getTableSnippet(), searchParam, searchSql)); String joinCond = beanMeta.getJoinCond();booleanhasJoinCond = StringUtils.isNotBlank(joinCond); List<FieldParam> fieldParamList = searchParam.getFieldParams();if(hasJoinCond |...
All Oracle Net naming methods that do not require using ORACLE_HOME (to locate configuration files such as tnsnames.ora or sqlnet.ora) work in the Instant Client mode. For C and C++ based applications, the connect string can be specified in the following formats: ...
SQL pattern matching makes it easy to solve other non-standard time grouping needs. For example, Oren Nakdimon shows how you can use this to combine events intogroups of equal frequency. Or you may want to group rows that are within N minutes of the last row. ...