如:sample表 member_id上的index: sample_mid_idx news表title上的unique index:news_titile_uidx; 9. SEQUENCE命名:seq_ table_name; 二、 注释说明 1. 本注释说明主要用于PL/SQL程序及其它SQL文件,其它可作参考; 2. SQLPLUS接受的注释有三种: ―― 这儿是注释 /* 这儿是注释 */ REM 这儿是注释...
函数(Function)是数据库系统中预定义的程序,用于执行特定的操作并返回一个值。Oracle 和 MySQL 都提供了丰富的函数库,用于处理数据、进行计算、格式化输出等。 相关优势 简化查询:函数可以简化复杂的 SQL 查询,使代码更易读、易维护。 提高性能:一些函数经过优化,执行效率较高。
SQL> select dbms_rowid.rowid_object('AAAAASAABAAAGiRAAG') obj# from dual; OBJ# --- 18 #根据rowid抽取表空间相对文件号 SQL> select dbms_rowid.rowid_relative_fno('AAAAASAABAAAGiRAAG') rfile# from dual; RFILE# --- 1 #根据rowid抽取块号 SQL> select dbms_rowid.ROWID_BLOCK_NUMBER('AAAAA...
function open_cursor:打开一个动态游标,并返回一个整型; procedure close_cursor(c in out integer) :关闭一个动态游标,参数为open_cursor所打开的游标; www.2cto.com procedure parse(c in integer, statement in varchar2, language_flag in integer):对动态游标所提供的sql语句进行解析,参数C表示游标,statemen...
Oracle SQL function XMLRoot. Use SQL/XML function XMLSerialize() with a version number instead. Nested tables stored as index-ordered tables (IOTs). This includes both the use of option DBMS_XMLSCHEMA.REGISTER_NT_AS_IOT, and the use of clause NESTED TABLE N STORE AS ... (...
| function | trunc(timestamptz,text) | 1.0 | sql | Skip due to version | gsql:Oracle_Functions.sql:1035: NOTICE: | function | nanvl(numeric,numeric) | 1.0 | sql | Skip due to version | gsql:Oracle_Functions.sql:1035: NOTICE: | function | regexp_substr(text,text,int4) | 2.0 ...
To enable logging for a particular Form function, set theLOGENABLEDfield to either1,YESorTRUEto create the file in the UTL_FILE_DIR folder. Consult with your DBA to verify that the UTL_FILE_DIR folder is available and accessible. Log files are namedUsername_MASTER_LOG.txt ...
OCI provides function to manipulate a CLOB CharSetId. What is the JDBC equivalent? In JDBC CLOBs are *always* in USC2, which is the Oracle character set corresponding to the Java "char" type. So there is no equivalent for the OCI CLOB CharSetId. ...
Scalability:Oracle RAC data affinity; and shard routing APIs for mid-tiers Security:Automatic provider resolution for OraclePKIProvider; support for Key Store Service (KSS); and HTTPS proxy support Data types:Accessibility to PL/SQL associate arrays; Oracle REF CURSOR as IN bind parameter; and JSON...
n查看创建触发器(TRIGGER)的SQL语句: SELECT DBMS_METADATA.GET_DDL('TRIGGER', U.OBJECT_NAME) FROM USER_OBJECTS U WHERE OBJECT_TYPE = 'TRIGGER'; n查看创建函数(FUNCTION)的SQL语句: SELECT DBMS_METADATA.GET_DDL('FUNCTION', U.OBJECT_NAME) ...