DEF[INE] [variable] | [variable = text] 这里define定义的host变量 text被定义成char类型的字符串 定义变量A=2 SQL> def A=v$session 查看所有的变量 SQL> def DEFINE _DATE = "02-9月 -15" (CHAR) DEFINE _CONNECT_IDENTIFIER = "orcl" (CHAR) DEFINE _USER = "TEST" (CHAR) DEFINE _PRIVILEGE ...
define var_name =value 2、define命令 >查看已定义的所有变量及其值:define SQL> define DEFINE _DATE = "10-3月 -00" (CHAR) DEFINE _CONNECT_IDENTIFIER = "orcl" (CHAR) DEFINE _USER = "user" (CHAR) DEFINE _PRIVILEGE = "" (CHAR) DEFINE _SQLPLUS_RELEASE = "1102000100" (CHAR) DEFINE _ED...
define var_name =value 2、define命令 >查看已定义的所有变量及其值:define SQL> define DEFINE _DATE = "10-3月 -00" (CHAR) DEFINE _CONNECT_IDENTIFIER = "orcl" (CHAR) DEFINE _USER = "user" (CHAR) DEFINE _PRIVILEGE = "" (CHAR) DEFINE _SQLPLUS_RELEASE = "1102000100" (CHAR) DEFINE _ED...
SQL> define b='a';SQL> define DEFINE _DATE = "01-4月 -08" (CHAR)DEFINE _CONNECT_IDENTIFIER = "db11" (CHAR)DEFINE _USER = "XYS" (CHAR)DEFINE _PRIVILEGE = "" (CHAR)DEFINE _SQLPLUS_RELEASE = "1101000600" (CHAR)DEFINE _EDITOR = "Notepad" (CHAR)DEFINE _O_VERSION = "...
前两天看到有人在pub上问在sqlplus中通过define和variable定义的变量的区别。其实define定义的我理解不是变量而是字符常量,通过define定义之后,在通过&或者&&引用的时候不需要输入了,仅此而已。oracle在执行的时候自动用值进行了替换;而variable定义的是绑定变量,上面已经提到。 1. C:>sqlplus xys/manager 2. SQL*Plus...
You can define a column or variable with a ROWID datatype, but Oracle doesn’t guarantee that any value placed in this column or variable is a valid ROWID. ORA_ROWSCN Oracle Database 10g and later releases support a pseudocolumn ORA_ROWSCN, which holds the System Change Number (SCN) of ...
Define theSTANDBY_ARCHIVE_DESTparameter to point to a location other than the flash recovery area. Doing so ensures that redo data received from the primary database is not archived in the flash recovery area. For example, when creating a logical standby database as described in Section 4.2.3....
Define ISO Reference DataDefining Currencies: Points to ConsiderWhen creating or editing currencies, consider these points relevant to entering the currency code, date range, or symbol for the currency.Currency CodesYou cannot change a currency code after you enable the currency, even if you later ...
Before you run any connector operations, on your Oracle client, set the environment variable named ORA_NCHAR_LITERAL_REPLACE to TRUE. This setting enables NCHAR string literal replacement, which prevents data loss when string literals that contain characters beyond the database character set are inser...
Before you run any connector operations, on your Oracle client, set the environment variable named ORA_NCHAR_LITERAL_REPLACE to TRUE. This setting enables NCHAR string literal replacement, which prevents data loss when string literals that contain characters beyond the database character set are inser...