BANNER
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Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
[oracle@localhost ~]$ cat /etc/issue
Enterprise Linux Enterprise Linux Server release 5.5 (Carthage)
Kernel on an m
sqlplus是经经常使用的工具了，它提供了非常多功能，用起来十分方便便捷。
1.获取帮助
SQL> help
HELP
----
Accesses this command line help system. Enter HELP INDEX or ?
INDEX
for a list of topics.
You can view SQL*Plus resources at
http://www.oracle.com/technology/tech/sql_plus/
and the Oracle Database Library at
http://www.oracle.com/technology/documentation/
HELP|?
[topic]
SQL> help index
Enter Help [topic] for help.
@ COPY PAUSE SHUTDOWN
@@ DEFINE PRINT SPOOL
/ DEL PROMPT SQLPLUS
ACCEPT DESCRIBE QUIT START
APPEND DISCONNECT RECOVER STARTUP
ARCHIVE LOG EDIT REMARK STORE
ATTRIBUTE EXECUTE REPFOOTER TIMING
BREAK EXIT REPHEADER TTITLE
BTITLE GET RESERVED WORDS (SQL) UNDEFINE
CHANGE HELP RESERVED WORDS (PL/SQL) VARIABLE
CLEAR HOST RUN WHENEVER OSERROR
COLUMN INPUT SAVE WHENEVER SQLERROR
COMPUTE LIST SET XQUERY
CONNECT PASSWORD SHOW
SQL> help set
SET
---
Sets a system variable to alter the SQL*Plus environment settings
for your current session. For example, to:
- set the display width for data
- customize HTML formatting
- enable or disable printing of column headings
- set the number of lines per page
SET system_variable value
where system_variable and value represent one of the following clauses:
APPI[NFO]{OFF|ON|text} NEWP[AGE] {1|n|NONE}
ARRAY[SIZE] {15|n} NULL text
AUTO[COMMIT] {OFF|ON|IMM[EDIATE]|n} NUMF[ORMAT] format
AUTOP[RINT] {OFF|ON} NUM[WIDTH] {10|n}
AUTORECOVERY {OFF|ON} PAGES[IZE] {14|n}
AUTOT[RACE] {OFF|ON|TRACE[ONLY]} PAU[SE] {OFF|ON|text}
[EXP[LAIN]] [STAT[ISTICS]] RECSEP {WR[APPED]|EA[CH]|OFF}
BLO[CKTERMINATOR] {.|c|ON|OFF} RECSEPCHAR {_|c}
CMDS[EP] {;|c|OFF|ON} SERVEROUT[PUT] {ON|OFF}
COLSEP {_|text} [SIZE {n | UNLIMITED}]
CON[CAT] {.|c|ON|OFF} [FOR[MAT] {WRA[PPED] |
COPYC[OMMIT] {0|n} WOR[D_WRAPPED] |
COPYTYPECHECK {ON|OFF} TRU[NCATED]}]
DEF[INE] {&|c|ON|OFF} SHIFT[INOUT] {VIS[IBLE] |
DESCRIBE [DEPTH {1|n|ALL}] INV[ISIBLE]}
[LINENUM {OFF|ON}] [INDENT {OFF|ON}] SHOW[MODE] {OFF|ON}
ECHO {OFF|ON} SQLBL[ANKLINES] {OFF|ON}
EDITF[ILE] file_name[.ext] SQLC[ASE] {MIX[ED] |
EMB[EDDED] {OFF|ON} LO[WER] | UP[PER]}
ERRORL[OGGING] {ON|OFF} SQLCO[NTINUE] {> | text}
[TABLE [schema.]tablename] SQLN[UMBER] {ON|OFF}
[TRUNCATE] [IDENTIFIER identifier] SQLPLUSCOMPAT[IBILITY] {x.y[.z]}
ESC[APE] {|c|OFF|ON} SQLPRE[FIX] {#|c}
ESCCHAR {@|?
|%|$|OFF} SQLP[ROMPT] {SQL>|text}
EXITC[OMMIT] {ON|OFF} SQLT[ERMINATOR] {;|c|ON|OFF}
FEED[BACK] {6|n|ON|OFF} SUF[FIX] {SQL|text}
FLAGGER {OFF|ENTRY|INTERMED[IATE]|FULL} TAB {ON|OFF}
FLU[SH] {ON|OFF} TERM[OUT] {ON|OFF}
HEA[DING] {ON|OFF} TI[ME] {OFF|ON}
HEADS[EP] {||c|ON|OFF} TIMI[NG] {OFF|ON}
INSTANCE [instance_path|LOCAL] TRIM[OUT] {ON|OFF}
LIN[ESIZE] {80|n} TRIMS[POOL] {OFF|ON}
LOBOF[FSET] {1|n} UND[ERLINE] {-|c|ON|OFF}
LOGSOURCE [pathname] VER[IFY] {ON|OFF}
LONG {80|n} WRA[P] {ON|OFF}
LONGC[HUNKSIZE] {80|n} XQUERY {BASEURI text|
MARK[UP] HTML [OFF|ON] ORDERING{UNORDERED|
[HEAD text] [BODY text] [TABLE text] ORDERED|DEFAULT}|
[ENTMAP {ON|OFF}] NODE{BYVALUE|BYREFERENCE|
[SPOOL {OFF|ON}] DEFAULT}|
[PRE[FORMAT] {OFF|ON}] CONTEXT text}
2.查看表的结构：
SQL> desc v$process;
名称 是否为空? 类型
----------------------------------------- -------- ----------------------------
ADDR RAW(4)
PID NUMBER
SPID VARCHAR2(24)
PNAME VARCHAR2(5)
USERNAME VARCHAR2(15)
SERIAL# NUMBER
TERMINAL VARCHAR2(30)
PROGRAM VARCHAR2(48)
TRACEID VARCHAR2(255)
TRACEFILE VARCHAR2(513)
BACKGROUND VARCHAR2(1)
LATCHWAIT VARCHAR2(8)
LATCHSPIN VARCHAR2(8)
PGA_USED_MEM NUMBER
PGA_ALLOC_MEM NUMBER
PGA_FREEABLE_MEM NUMBER
PGA_MAX_MEM NUMBER
3.编辑sql语句(以下罗列了一部分命令）
A[PPEND] text 将text附加到当前行之后
C[HANGE] /old/new 将当前行的old替换成old
CL[EAR]BUFF[ER] 清除缓冲区的全部行
DEL 删除当前行
DEL x 删除x行
L[IST] 列出缓冲区的全部行
L[IST] x 列出缓冲区的第x行
R[UN] 或者 / 执行缓冲区所保存的语句
x 将x行作为当前行
SQL> LIST
1* select * from t
SQL> clear buffer;
buffer 已清除
SQL> list
SP2-0223: SQL 缓冲区中不存在行。
BANNER
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Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
SQL> run
1* select * from v$version
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Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
4.保存，检索并执行文件
SAV[E] filename :将sqlplus里的缓冲区的内容保存到filename指定的文件里，append将缓冲区的内容追加到现有的文件之后。replace说明替换一个现有的文件
[{REPLACE|APPEND}]
GET filename：将filename里指定的内容读入到sqlplus缓冲区中
STA[RT] filename：将filename里指定的内容读入到sqlplus缓冲区中，并执行
@filename：同start命令
ED[IT]：sqlplus里缓冲区的内容拷贝到一个命为afiedt.buf的文件里，然后启动os默认的编辑器。在退出编辑器时。当中的内容被拷贝到sqlplus缓冲区中
ED[IT] filename：与edit同样。不同的是指定了文件名称
SPO[OL] filename：sqlplus缓冲区的内容拷贝到filename文件里
SPO[OL] OFF：停止sqlplus的输出结果拷贝到filename指定的文件里。并关闭该文件
SQL> edit
已写入 file afiedt.buf
1* select * from v$version
SQL> !cat afiedt.buf
select * from v$version
/
SQL> spool diy_os.lst
SQL> select * from v$version;
BANNER
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Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for Linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL> spool off;
SQL> !cat wang.lst
SQL> select * from v$version;
BANNER
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Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for Linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL> spool off;
5.格式化列。清除列格式
COL[UMN] {column | alias}[options]
column指定列名
alias 指定格式化列的别名
option 指定用于格式化列或者别名的一个或多个选项
格式化选项：
FOR[MATE] format：将列或别名的显示格式设置为由format字符串指定的格式
HEA[DING] heading：将列或别名的标题中的文本设置成有heading字符串指定的格式
JUS[TIFY] [{LEFT|CENTER|RIGHT}] ：将列输出设置为左对齐，居中，或右对齐
WRA[PPED]：在输出结果中将一个字符串的末尾换行显示，该选项可能导致单个单词跨越多行
WOR[D_WRAPPED]：与WRAPPED选项类似，不同之处在于单个单词不会跨越两行
CLE[AR]：清除列的不论什么格式化（将格式设置成默认）=>colum id clear;
上面format能够使用非常多格式化參数
比方：
COLUMN LAST_NAME FORMAT A20 HEADING 'EMPLOYEE|NAME'
COLUMN SALARY FORMAT $9,999,990.99
COLUMN SALARY+COMMISSION_PCT+BONUS-EXPENSES-INS-TAX ALIAS NET
COLUMN NET FORMAT $9,999,999.99 NULL '<NULL>'
COLUMN REMARKS FORMAT A20 WRAP
下面摘自官方文档： http://docs.oracle.com/cd/E11882_01/server.112/e16604/ch_twelve013.htm
Character Columns
The default width of CHAR, NCHAR, VARCHAR2 (VARCHAR) and NVARCHAR2 (NCHAR VARYING) columns is the width of the column in the database. SQL*Plus formats these datatypes left-justified. If a value does not fit within the column width, SQL*Plus wraps or truncates the character string depending on the setting of SET WRAP.
A LONG, BLOB, BFILE, CLOB, NCLOB or XMLType column's width defaults to the value of SET LONGCHUNKSIZE or SET LONG, whichever one is smaller.
SQL*Plus truncates or wraps XMLType columns after 2000 bytes. To avoid this you need to set an explicit COLUMN format for the XMLType column. A COLUMN format can be up to a maximum of 60000 per row.
To change the width of a datatype to n, use FORMAT An. (A stands for alphabetic.) If you specify a width shorter than the column heading, SQL*Plus truncates the heading.
DATE ColumnsThe default width and format of unformatted DATE columns in SQL*Plus is derived from the NLS_DATE_FORMAT parameter. The NLS_DATE_FORMAT setting is determined by the NLS territory parameter. For example, the default format for the NLS territory, America, is DD-Mon-RR, and the default width is A9. The NLS parameters may be set in your database parameter file, in environment variables or an equivalent platform-specific mechanism. They may also be specified for each session with the ALTER SESSION command. For more information about DATE formats, and about NLS parameters, see the Oracle Database SQL Language Reference.
You can change the format of any DATE column using the SQL function TO_CHAR in your SQL SELECT statement. You may also wish to use an explicit COLUMN FORMAT command to adjust the column width.
When you use SQL functions like TO_CHAR, Oracle Database automatically enables a very wide column. The default column width may also depend on the character sets in use in SQL*Plus and in the database. To maximize script portability if multiple characters sets are used, Oracle Database recommends using COLUMN FORMAT for each column selected.
To change the width of a DATE column to n, use the COLUMN command with FORMAT An. If you specify a width shorter than the column heading, the heading is truncated.
NUMBER Columns For numeric columns, COLUMN FORMAT settings take precedence over SET NUMFORMAT settings, which take precedence over SET NUMWIDTH settings.
See SET NUMF[ORMAT] format and SET NUM[WIDTH] {10 | n}.
To change a NUMBER column's width, use FORMAT followed by an element as specified in Table 12-1, "Number Formats".
| Element | Examples | Description |
|---|---|---|
|
, (comma) |
9,999 |
Displays a comma in the specified position. |
|
. (period) |
99.99 |
Displays a period (decimal point) to separate the integral and fractional parts of a number. |
|
$ |
$9999 |
Displays a leading dollar sign. |
|
0 |
0999 9990 |
Displays leading zeros Displays trailing zeros. |
|
9 |
9999 |
Displays a value with the number of digits specified by the number of 9s. Value has a leading space if positive, a leading minus sign if negative. Blanks are displayed for leading zeroes. A zero (0) is displayed for a value of zero. |
|
B |
B9999 |
Displays blanks for the integer part of a fixed-point number when the integer part is zero, regardless of zeros in the format model. |
|
C |
C999 |
Displays the ISO currency symbol in the specified position. |
|
D |
99D99 |
Displays the decimal character to separate the integral and fractional parts of a number. |
|
EEEE |
9.999EEEE |
Displays value in scientific notation (format must contain exactly four "E"s). |
|
G |
9G999 |
Displays the group separator in the specified positions in the integral part of a number. |
|
L |
L999 |
Displays the local currency symbol in the specified position. |
|
MI |
9999MI |
Displays a trailing minus sign after a negative value. Display a trailing space after a positive value. |
|
PR |
9999PR |
Displays a negative value in <angle brackets>. Displays a positive value with a leading and trailing space. |
|
RN rn |
RN rn |
Displays uppercase Roman numerals. Displays lowercase Roman numerals. Value can be an integer between 1 and 3999. |
|
S |
S9999 9999S |
Displays a leading minus or plus sign. Displays a trailing minus or plus sign. |
|
TM |
TM |
Displays the smallest number of decimal characters possible. The default is TM9. Fixed notation is used for output up to 64 characters, scientific notation for more than 64 characters. Cannot precede TM with any other element. TM can only be followed by a single 9 or E |
|
U |
U9999 |
Displays the dual currency symbol in the specified position. |
|
V |
999V99 |
Displays value multiplied by 10n, where n is the number of 9's after the V. |
|
X |
XXXX xxxx |
Displays the hexadecimal value for the rounded value of the specified number of digits. |
SQL> set pagesize 100
SQL> set linesize 100
SQL> select * from dba_data_files where rownum<4;
FILE_NAME
----------------------------------------------------------------------------------------------------
FILE_ID TABLESPACE_NAME BYTES BLOCKS STATUS RELATIVE_FNO AUT
---------- ------------------------------ ---------- ---------- --------- ------------ ---
MAXBYTES MAXBLOCKS INCREMENT_BY USER_BYTES USER_BLOCKS ONLINE_
---------- ---------- ------------ ---------- ----------- -------
/u01/app/oracle/oradata/orcl3939/user01.dbf
4 USERS 52428800 6400 AVAILABLE 4 NO
0 0 0 51380224 6272 ONLINE
/u01/app/oracle/oradata/orcl3939/undotbs01.dbf
3 UNDOTBS1 917504000 112000 AVAILABLE 3 YES
3.4360E+10 4194302 640 916455424 111872 ONLINE
/u01/app/oracle/oradata/orcl3939/sysaux01.dbf
2 SYSAUX 754974720 92160 AVAILABLE 2 YES
3.4360E+10 4194302 1280 753926144 92032 ONLINE
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