Oracle SQL Reference 下载积分: 0 内容提示: Reserved WordsACCESSADDALLALTERANDANYASASCAUDITBETWEENBYCHARCHECKCLUSTERCOLUMNCOMMENTCOMPRESSCONNECTCREATECURRENTDATEDECIMALDEFAULTDELETEDESCDISTINCTDROPELSEEXCLUSIVEEXISTSFILEFLOATFORFROMC. Michael Eliasz, Sr. Oracle Data ArchitectBuilt-in FunctionsABSACOSADD_MONTHSASCII...
5.2.1Syntax Rules for Specifying Properties The properties are set using keyword-value pairs in the SQLCREATE TABLEACCESS PARAMETERSclause and in the configuration files. The syntax must obey these rules: The format of each keyword-value pair is akeyword, a colon or equal sign, and avalue. T...
除了记录和表之外,还有对象类型、集合(嵌套表和VARRAYS)等类型,这些将专门讲解。 四、引用(REFERENCE) 在PL/SQL8.0之前,只有一种类型--REF CURSOR,也就是游标。它的定义较为简单, CURSOR cursor_name IS select ...from...; 在PL/SQL8.0之后,引入了REF类型,它指向一个对象。这种类型将单独讲解。(等我弄明...
SQL > col tablespace format a20SQL > select b.file_id 文件ID, b.tablespace_name 表空间, b.file_name 物理文件名, b.bytes 总字节数, (b.bytes-sum(nvl(a.bytes,0))) 已使用, sum(nvl(a.bytes,0)) 剩余, sum(nvl(a.bytes,0))/(b.bytes)*100 剩余百分比 from dba_free_space a,dba_d...
Changes in This Release for Oracle Database SQL Language Reference 1 Introduction to Oracle SQL 2 Basic Elements of Oracle SQL 3 Pseudocolumns 4 Operators 5 Expressions 6 Conditions 7 Functions 8 Common SQL DDL Clauses 9 SQL Queries and Subqueries 10 SQL Statements: ADMINISTER KEY MANAGEMENT to...
Oracle SQL: the Essential Reference by David C. Kreines Buy on Amazon ROUND ROUND(d[,fmt]) Rounds a date/time value to the nearest date/time unit specified. Parameters d Specifies a date/time value. fmt Specifies a date format element. SeeTable 5-4for a complete list. The input value...
Oracle SQL: the Essential Reference by David C. Kreines Buy on Amazon 7.3. Declaration Section The declaration section is required if any variables are to be used in a PL/SQL block. The declaration section also defines cursors, types, local procedures, and functions that are used in a block...
本系列将以《Database PL/SQL Language Reference》的PL/SQL代码例为主线进行介绍。 Oracle PL/SQL基础语法学习16:CASE Expression(CASE表达式) CASE Expression(CASE表达式)介绍 在Oracle PL/SQL中,CASE表达式(CASE Expression)是一个非常强大且常用的工具,可以用于在SQL或PL/SQL中执行基于条件的操作。CASE表达式类似...
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