博客园_Web.网际浪人.Blog

C# Process调用应用程序失败时应注意的问题

2011-03-22T03:07:00Z

C#中如果采用Process调用应用程序失败，请添加下列第一行，设置应用程序所在的路径。

　　　　　　Directory.SetCurrentDirectory([应用程序所在路径]);
                    Process process = new Process();
                    process.StartInfo.FileName = [应用程序名称];
                    process.StartInfo.Arguments = [调用参数];
                    process.StartInfo.UseShellExecute = false;
                    process.StartInfo.CreateNoWindow = true;
                    process.Start();
                    process.WaitForExit();

本文链接

程序员的幽默

2011-01-05T15:26:00Z

1、客户端：一个IT经理走进一家拉面馆说：“你们需要客户端吗？” 老板说：“面一般是伙计端，忙的时候才需要客户端。”

2、云计算：中国一留学生去美国打工的当过报童，不带计算器，习惯动作抬头望天时心算找零。顾客大为惊讶，纷纷掏出计算器验证，皆无误，也抬头望天，惊恐问：“云计算？”

3、1k=1024：A：哥们，最近手头紧，借点钱吧？B：好啊，要多少？A：一千行不？B：咱俩谁跟谁！给你凑个整数，这有一千零二十四，拿去。

4、GeForce：一直觉得NVIDIA应该把“GeForce“更名为“GeiForce”，中文翻译为“给力！”

5、反括号：据说某俄国特工九死一生偷到了美国NASA太空火箭发射程序源代码的最后一页，结果代码是：“}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}”

6、IDE：A：为什么你的关键字会变蓝，我的没有? B：（看了一下，没来及说话）A：为什么我的字下面有波浪线，你的没有? B：你为什么开个Word来编程？

本文链接

To腾讯：强行收集用户个人隐私的行为不可饶恕

2010-09-28T18:11:00Z

今日，网上偶然看到360安全卫士提醒更新——“360隐私保护器”。

真是不用不知道，一用吓一跳，大家天天使用的腾讯QQ，居然是潜伏在我们电脑里的一个重大特务分子，幸好360将其揪了出来。先不论360安全卫士出于什么样的目的，商业竞争或者真为网民办实事，腾讯QQ这次小辫子真是被牢牢抓住了。

启动QQ五分钟以上时，果然如360所说，腾讯对非QQ程序之外的其他应用程序的监视开始了，主流的软件真是一个都没逃脱：

即时聊天工具：MSN、飞信、Skype

视频：土豆、PPStream

文档：word、excel、ppt

压缩包：zip、rar

安全：360安全卫士

输入法：搜狗拼音

浏览器：傲游

下载：迅雷、电骡

……（我本地安装的程序有限，QQ实际跟踪监视的软件应该更多）

QQ，你个聊天工具不安分守己做好自己的事，看我电脑里的其他程序是何居心？诚然你现在是互联网公敌，在各个领域都有重量级的竞争对手，但你在我的电脑里看别人做事情干嘛呢？

如果说查看你竞争对手的程序，可解释为：为自己同类型产品的用户体验改善而进行的一点小偷行为。但尤为重要的是：对于俺办公类应用程序的监控，你的居心何在？为什么要看我的文件？这样做真是不可饶恕！！你这样做的后果，只能是让长久以往培养出来的客户群失去对你的信赖，如果十几亿网民只要打开QQ干别的事情时，一举一动都处在你的严密监视之中，个人隐私或者商业机密如何保证？那大家应采取的方式只能是不使用QQ，改为其他即时通讯工具MSN或者SKYPE，虽然不及你本土化做得够，但人家基本的即时通讯功能没有丧失，只是没有你附加的那些花花草草的东西。看来很多公司内部网络上对QQ的封杀的确是相当明智的做法。

进一步讲，如果仅QQ这一工具就对我们的机器有了如此的监控，那么腾讯开发的其他工具又能让人放心吗？东方不亮西方亮，搞不好，明天QQ更新版本，不做这些监控了。不过却转移到QQ游戏、QQ音乐、QQ旋风下载之类的客户端工具上去，谁说得定呢？

早些年，听说QQ为了改善用户体验，悄悄地对用户在QQ客户端上的所有行为进行了记录，不过出发点是好的，做得还不算过分，仅限于自身软件用户行为的记录。可现在你这样将监控范围无限制的扩大化，远超出了改善QQ软件本身用户体验而收集用户隐私的范畴。点解啊？莫非处于某种不可告人的目的，莫非也不是你自愿的，而是中国特色的互联网环境“逼”着你监控大家的。如果这样，那你确实也没办法去掉这些隐私监控的小偷行为，那俺们只有另换一种相对信息安全一点的即时通讯工具了。如果360借此机会推出自己的即时通讯工具，不妨暂时一试。

别了，腾讯QQ。别了，腾讯所有的“山寨”应用。尽管哥现在已经不常用QQ了，不过还有很多亲戚朋友、哥们弟兄天天在QQ上面耗着，给大家提个醒。小心为妙！

本文链接

VS2005打开VS2008项目的2种方法（转）

2010-08-12T03:12:00Z

vs2008支持.net3.5，而vs2005支持.net2.0，所以使用vs2005打开vs2008的项目，要确定你的项目是.net2.0的。

下面介绍2种方法：

方法1：用记事本打开.sln文件，你将看到
Microsoft Visual Studio Solution File, Format Version 10.00
# Visual Studio 2008
你把它改成：
Microsoft Visual Studio Solution File, Format Version 9.00
# Visual Studio 2005
即可用2005来打开

方法2：
1. 用记事本打开解决方案文件[解决方案名].sln，然后修改最上面两行为如下代码：
Microsoft Visual Studio Solution File, Format Version 9.00 # Visual Studio 2005

2. 用记事本打开每个项目文件[项目名].csproj，在<PropertyGroup>节点下移除如下节点：
<TargetFrameworkVersion>v2.0</TargetFrameworkVersion>
并且修改ProductVersion和Import两个节点为如下：
<ProductVersion>8.0.50727</ProductVersion>
<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />

这样应该就可以打开了。

本文链接

【转】Oracle Conversion Functions

2010-03-26T15:39:00Z

Oracle Conversion Functions

Version 11.1

Note: Functions for converting to date, numeric, string, and timestamp data types can be found through the related links.

ASCIISTR

Converts An ASCII String To An ASCII String In The Database's Character Set

ASCIISTR(ch VARCHAR2 CHARACTER SET ANY_CS)
RETURN VARCHAR2 CHARACTER SET ch%CHARSET;

SELECT ASCIISTR(CHR(128) || 'Hello' || CHR(255))
FROM dual;

BFILENAME

Returns a BFILE from a combination of a directory and a file name

BFILENAME(directory IN VARCHAR2, filename IN VARCHAR2) RETURN BFILE;

DECLARE
src_file BFILE;
BEGIN
src_file := bfilename('CTEMP', 'myfile.txt');
END;
/

BIN_TO_NUM

Converts a bit vector to a number

BIN_TO_NUM(<value>,<value>,....)

SELECT BIN_TO_NUM(1, 0, 1, 0) FROM dual;

CAST

Converts one built-in datatype or collection-typed value into another built-in datatype or collection-typed value

CAST(<string_or_column> AS <DATATYPE>)

SELECT CAST(15402 AS VARCHAR2(30))
FROM dual;

CHARTOROWID

Converts a value from CHAR, VARCHAR2, NCHAR, or NVARCHAR2 datatype to ROWID datatype

CHARTOROWID(<char>);

conn hr/hr

SELECT rowid
FROM employees;

SELECT last_name
FROM employees
WHERE ROWID = CHARTOROWID('AAAQvRAAFAAAABYAAp');

COMPOSE

Convert a string in any data type to a Unicode string

COMPOSE(<string_or_column>)

Unistring Value	Resulting character
unistr('\0300')	grave accent (`)
unistr('\0301')	acute accent (?
unistr('\0302')	circumflex (ˆ)
unistr('\0303')	tilde (~)
unistr('\0308')	umlaut (?

SELECT 'ol' || COMPOSE('e' || UNISTR('\0301')) FROM dual;

CONVERT

Converts a character string from one character set to another

CONVERT(<char>, <dest_char_set>, <source_char_set>)

SELECT CONVERT('?????A B C D E','US7ASCII','WE8ISO8859P1')
FROM dual;

DECOMPOSE

Converts a unicode string to a string

DECOMPOSE(<unicode_string>)

SELECT DECOMPOSE('ol' || COMPOSE('e' || UNISTR('\0301')))
FROM dual;

HEXTORAW

Converts char containing hexadecimal digits in the CHAR, VARCHAR2, NCHAR, or NVARCHAR2 character set to a raw value

HEXTORAW(<hex_value>)

CREATE TABLE test (
raw_col RAW(10));

desc test

INSERT INTO test VALUES (HEXTORAW('7D'));

SELECT * FROM test;

NUMTODSINTERVAL

Converts a number to an INTERVAL DAY TO SECOND literal

NUMTODSINTERVAL(n, <interval_unit>)

SELECT NUMTODSINTERVAL(120, 'DAY') FROM dual;

SELECT NUMTODSINTERVAL(1200, 'HOUR') FROM dual;

SELECT NUMTODSINTERVAL(12000, 'MINUTE') FROM dual;

SELECT NUMTODSINTERVAL(120000, 'SECOND') FROM dual;

NUMTOYMINTERVAL

Converts n to an INTERVAL YEAR TO MONTH literal

NUMTOYMINTERVAL(n, <interval_unit>)

conn hr/hr

SELECT last_name, hire_date, salary, SUM(salary)
OVER (ORDER BY hire_date
RANGE NUMTOYMINTERVAL(1, 'YEAR') PRECEDING) AS t_sal
FROM employees;

RAWTOHEX

Converts raw to a character value containing its hexadecimal equivalent

RAWTOHEX(<raw_value>)

CREATE TABLE test (
raw_col RAW(10));

desc test

INSERT INTO test VALUES (HEXTORAW('7D'));

SELECT * FROM test;
SELECT RAWTOHEX(raw_col) HEXVAL
FROM test;

RAWTONHEX

Converts raw to an NVARCHAR2 character value containing its hexadecimal equivalent

RAWTONHEX(<raw_value>);

col dumpcol format a30

SELECT RAWTONHEX(raw_col) HEXVAL, dump(raw_col) dumpcol
FROM test;

REFTOHEX

Converts argument expr to a character value containing its hexadecimal equivalent. expr must return a REF.

REFTOHEX(<expr>);

conn oe/oe

CREATE TABLE warehouse_table OF warehouse_typ
(PRIMARY KEY (warehouse_id));

CREATE TABLE location_table (
location_number NUMBER,
building REF warehouse_typ SCOPE IS warehouse_table);

INSERT INTO warehouse_table VALUES (1, 'Downtown', 99);

INSERT INTO location_table SELECT 10, REF(w)
FROM warehouse_table w;

SELECT REFTOHEX(building) FROM location_table;

DROP TABLE warehouse_table PURGE;

ROWIDTOCHAR

Converts a rowid value to VARCHAR2 datatype

ROWIDTOCHAR(rowid);

SELECT COUNT(*)
FROM servers;

SELECT rowid
FROM servers
WHERE rownum < 11;

SELECT ROWID
FROM servers
WHERE ROWIDTOCHAR(ROWID) LIKE '%AAB%';

ROWIDTONCHAR

Converts a rowid value to NVARCHAR2 datatype

ROWIDTOCHAR(rowid)

See ROWIDTOCHAR demo above

SCN_TO_TIMESTAMP

Returns the approximate Timestamp for an SCN

SCN_TO_TIMESTAMP(<scn>);

SELECT current_scn
FROM v$database;

SELECT SCN_TO_TIMESTAMP(8215026-250000)
FROM dual;

TIMESTAMP_TO_SCN

Returns the approximate SCN for a timestamp

TIMESTAMP_TO_SCN(<timestamp>)

SELECT TIMESTAMP_TO_SCN(SYSTIMESTAMP)
FROM dual;

TO_BINARY_DOUBLE

Converts a Value to the BINARY_DOUBLE Data Type

TO_BINARY_DOUBLE(<value>);

See TO_NUMBER demo, below.

TO_BINARY_FLOAT

Converts a Value to the BINARY_FLOAT Data Type

TO_BINARY_FLOAT(<value>) RETURN BINARY_FLOAT

See TO_NUMBER demo, below.

TO_CHAR

Convert Datatype To String

TO_CHAR(<string_or_column>, <format>) RETURN VARCHAR2

SELECT TO_CHAR(SYSDATE, 'MM/DD/YYYY HH:MI:SS') FROM dual;

Converts DATE and TIMESTAMP to VARCHAR2 with the specified format

The "X" in the ROUND and TRUNC column indicates that these symbols with these functions

TO_DATE(<date_string>, <format mask>, <NLS_PARAMETER>)

-- before running these demos
SQL> ALTER SESSION SET NLS_DATE_FORMAT = 'DD-MON-YYYY HH24:MI:SS';

Symbol	Description	ROUND	TRUNC
CC	One greater than the first two digits of a four-digit year	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'CC') FROM dual; TO_CHAR(SYSDATE,'CC') --------------------------------------------- 21
D	Starting day of the week	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'D') FROM dual; TO_CHAR(SYSDATE,'D') -------------------------------------------- 4
DD	Day	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'DD') FROM dual; TO_CHAR(SYSDATE,'DD') --------------------------------------------- 02
DDD	Day	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'DDD') FROM dual; TO_CHAR(SYSDATE,'DDD') ---------------------------------------------- 093
DAY	Starting day of the week	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'DAY') FROM dual; TO_CHAR(SYSDATE,'DAY') ---------------------------------------------- WEDNESDAY
DY	Starting day of the week	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'DY') FROM dual; TO_CHAR(SYSDATE,'DY') ---------------------------------------------- WED
HH	Hours	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'HH') FROM dual; TO_CHAR(SYSDATE,'HH') --------------------------------------------- 10
HH12	Hours
	SQL> SELECT TO_CHAR(SYSDATE, 'HH12') FROM dual; TO_CHAR(SYSDATE,'HH12') ----------------------------------------------- 10
HH24	Hours
	SQL> SELECT TO_CHAR(SYSDATE, 'HH24') FROM dual; TO_CHAR(SYSDATE,'HH24') ----------------------------------------------- 22
I	ISO Year	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'I') FROM dual; TO_CHAR(SYSDATE,'I') -------------------------------------------- 8
IW	Same day of the week as the first day of the ISO year
	SQL> SELECT TO_CHAR(SYSDATE, 'IW') FROM dual; TO_CHAR(SYSDATE,'IW') --------------------------------------------- 14
IY	ISO Year
	SQL> SELECT TO_CHAR(SYSDATE, 'IY') FROM dual; TO_CHAR(SYSDATE,'IY') --------------------------------------------- 08
IYY	ISO Year
	SQL> SELECT TO_CHAR(SYSDATE, 'IYY') FROM dual; TO_CHAR(SYSDATE,'IYY') ------------------------------------------------ 008
IYYY	ISO Year
	SQL> SELECT TO_CHAR(SYSDATE, 'IYYY') FROM dual; TO_CHAR(SYSDATE,'IYYY') ------------------------------------------------ 2008
J	Julian Day
	SQL> SELECT TO_CHAR(SYSDATE, 'J') FROM dual; TO_CHAR(SYSDATE,'J') -------------------------------------------- 2454559
MI	Minutes	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'MI') FROM dual; TO_CHAR(SYSDATE,'MI') --------------------------------------------- 29
MM	Month (rounds up on the sixteenth day)
	SQL> SELECT TO_CHAR(SYSDATE, 'MM') FROM dual; TO_CHAR(SYSDATE,'MM') --------------------------------------------- 04
MON	Month (rounds up on the sixteenth day)	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'MON') FROM dual; TO_CHAR(SYSDATE,'MON') ---------------------------------------------- APR
MONTH	Month (rounds up on the sixteenth day)	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'MONTH') FROM dual; TO_CHAR(SYSDATE,'MONTH') ------------------------------------------------ APRIL
Q	Quarter (rounds up on 16th day of the 2nd month of the quarter)
	SQL> SELECT TO_CHAR(SYSDATE, 'Q') FROM dual; TO_CHAR(SYSDATE,'Q') -------------------------------------------- 2
RM	Month (rounds up on the sixteenth day) in Roman Numerals
	SQL> SELECT TO_CHAR(SYSDATE, 'RM') FROM dual; TO_CHAR(SYSDATE,'RM') --------------------------------------------- IV
SCC	One greater than the first two digits of a four-digit year	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'SCC') FROM dual; TO_CHAR(SYSDATE,'SCC') ---------------------------------------------- 21
SYYYY	Year (rounds up on July 1)	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'SYYYY') FROM dual; TO_CHAR(SYSDATE,'SYYYY') ------------------------------------------------ 2008
W	Week number in the month
	SQL> SELECT TO_CHAR(SYSDATE, 'W') FROM dual; TO_CHAR(SYSDATE,'W') -------------------------------------------- 1
WW	Week of the year
	SQL> SELECT TO_CHAR(SYSDATE, 'WW') FROM dual; TO_CHAR(SYSDATE,'WW') --------------------------------------------- 14
Y	One Digit Year	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'Y') FROM dual; TO_CHAR(SYSDATE,'Y') -------------------------------------------- 8
YY	Two Digit Year	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'YY') FROM dual; TO_CHAR(SYSDATE,'YY') --------------------------------------------- 08
YYY	Three Digit Year	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'YYY') FROM dual; TO_CHAR(SYSDATE,'YYY') ---------------------------------------------- 008
YYYY	Four Digit Year	X	X
	SQL> SELECT TO_CHAR(SYSDATE, 'YYYY') FROM dual; TO_CHAR(SYSDATE,'YYYY') ----------------------------------------------- 2008

CREATE TABLE t (
datecol1 DATE,
datecol2 DATE);

INSERT INTO t (datecol1, datecol2) VALUES (SYSDATE, SYSDATE);

col col1 format a30
col col2 format a20
col col3 format a20
col "Financial Quarter" format a20

SELECT TO_CHAR(datecol1, 'DAY-MONTH-YY') COL1,
       TO_CHAR(datecol2, 'D-MM/YYYY HH24:MI:SS') COL2,
       TO_CHAR(datecol2, 'YYYY-MON-DD HH24') COL3,
       TO_CHAR(datecol2, 'Q') "Financial Quarter"
FROM t;

Demo of FM Formatting From Tom Kyte (Oracle Magazine 3-4/2004)

SELECT TO_CHAR(dt, 'HH:MI AM') A,
TO_CHAR(dt, 'FMHH:MI AM') B,
TO_CHAR(dt, 'FMHHFM:MI AM') C
FROM (SELECT TO_DATE('09:01 am', 'HH:MI AM') dt FROM dual);

Convert NUMBER to CHARACTER

TO_CHAR(number)

SELECT TO_CHAR(123)
FROM dual;

Convert NUMBER to HEX

TO_CHAR(NUMBER) RETURN HEX

SELECT TO_CHAR(1048576,'XXXXXXXX')
FROM dual;

TO_CLOB

Converts CHAR, NCHAR, VARCHAR2, NVARCHAR2, or NCLOB values to CLOB values

TO_CLOB(right VARCHAR2 CHARACTER SET ANY_CS) RETURN CLOB;

SELECT TO_CLOB('Some value')
FROM dual;

TO_DATE

Convert A String With Default Format To A Date

TO_DATE(<string>) RETURN DATE

SELECT TO_DATE('01-JAN-2004') FROM dual;

Convert A String With A Non-Default Format To A Date

TO_DATE(<string>, <format mask>)

SELECT TO_DATE('01/01/2004', 'MM/DD/YYYY') FROM dual;

Convert A String With A Non-Default Format And Specify The Language

TO_DATE(<string>, <format mask>) RETURN DATE

SELECT TO_DATE('January 12, 2005, 11:03 A.M.', 'MONTH DD, YYYY, HH:MI A.M.', 'NLS_DATE_LANGUAGE = American')
FROM dual;

Convert A String With A Non-Default Format And Specify The Language

TO_DATE(<date_string>, <format mask>, <NLS_PARAMETER>) RETURN DATE

ALTER SESSION SET NLS_TERRITORY = 'JAPAN';

SELECT TO_DATE('January 12, 2005, 11:03 A.M.', 'Month dd, YYYY, HH:MI A.M.', 'NLS_DATE_LANGUAGE = American')
FROM DUAL;

ALTER SESSION SET NLS_TERRITORY = 'AMERICA';

Convert A String To 24 Hour Time

TO_DATE(<date_string>, <format mask>) RETURN DATE

SELECT TO_CHAR(SYSDATE, 'MM/DD/YY HH24:MI:SS') FROM dual;

TO_DSINTERVAL

Converts A String To An INTERVAL DAY TO SECOND DataType

TO_DSINTERVAL(<date_string>, <format mask>, <NLS_PARAMETER>)

conn hr/hr

SELECT employee_id, last_name
FROM employees
WHERE hire_date + TO_DSINTERVAL('100 10:00:00') <= DATE '1990-01-01';

TO_LOB

Converts LONG or LONG RAW values in the column long_column to LOB values

TO_LOB(long_column) RETURN LOB

desc user_triggers

CREATE TABLE lobtest (
testcol CLOB);

INSERT INTO lobtest
SELECT TO_LOB(trigger_body)
FROM user_triggers;

TO_MULTI_BYTE

Returns char with all of its single-byte characters converted to their corresponding multibyte characters

TO_MULTI_BYTE(character_string)

-- must be run in a UTF8 database to see the difference
SELECT dump('A') FROM dual;

SELECT dump(TO_MULTI_BYTE('A')) FROM dual;

TO_NCHAR

Converts a DATE or TIMESTAMP from the database character set to the National Character Set specified

TO_NCHAR(<date_string | interval | CLOB | number>,
<format mask>, <NLS_PARAMETER>) RETURN NCHAR

SELECT TO_NCHAR('ABC')
FROM dual;

SELECT TO_NCHAR(1048576)
FROM dual;

conn oe/oe

SELECT TO_NCHAR(order_date)
FROM orders
WHERE order_status > 9;

TO_NCLOB

Converts CLOB values in a LOB column or other character strings to NCLOB

TO_NCLOB(lob_or_character_value) RETURN NCLOB

CREATE TABLE nclob_test(
nclobcol NCLOB);

desc nclob_test

INSERT INTO nclob_test
(nclobcol)
VALUES
(TO_NCLOB('Convert this text into the NCLOB data type'));

TO_NUMBER

Converts a string to the NUMBER data type

TO_NUMBER(<value>[, <format>, <NLS parameter>]) RETURN NUMBER

CREATE TABLE test (
testcol VARCHAR2(10));

INSERT INTO test VALUES ('12345.67');

SELECT TO_BINARY_DOUBLE(testcol) BIN_DOUBLE, TO_BINARY_FLOAT(testcol) BIN_FLOAT, TO_NUMBER(testcol) NMBR
FROM test;

Converts a HEX number to FLOAT

TO_NUMBER(<value>, <format>);

SELECT TO_NUMBER('0A', 'XX')
FROM dual;

SELECT TO_NUMBER('1F', 'XX')
FROM dual;

Converts a HEX number to DECIMAL

TO_NUMBER(<binary_float | binary_double | number>,
'<hex mask>') RETURN <binary_float | binary_double | number>;

SELECT TO_NUMBER(100000,'XXXXXXXX')
FROM dual;

TO_SINGLE_BYTE

Returns char with all of its multibyte characters converted to their corresponding single-byte characters

TO_SINGLE_BYTE(character_string)

-- must be run in a UTF8 database to see the difference

SELECT TO_SINGLE_BYTE(CHR(15711393))
FROM dual;

TO_TIMESTAMP

Converts a string to an Timestamp Data Type

TO_TIMESTAMP(<date_string>, <format mask>, <NLS_PARAMETER>)
RETURN TIMESTAMP

SELECT TO_TIMESTAMP('2004-12-01 11:00:00','YYYY-MM-DD HH:MI:SS')
FROM dual;

TO_TIMESTAMP_TZ

Converts a string to an Timestamp with Timezone Data Type

TO_TIMESTAMP(<date_string>, <format mask>, <NLS_PARAMETER>)
RETURN TIMESTAMP WITH TIMEZONE

SELECT TO_TIMESTAMP_TZ('2004-12-01 11:00:00 -8:00',
'YYYY-MM-DD HH:MI:SS TZH:TZM') FROM dual;

TO_YMINTERVAL

Converts a character string of CHAR, VARCHAR2, NCHAR, or NVARCHAR2 datatype to an INTERVAL YEAR TO MONTH type

TO_YMINTERVAL(<char>) RETURN YMINTERVAL

SELECT hire_date, hire_date+TO_YMINTERVAL('01-02') "14 months"
FROM emp;

TRANSLATE USING

Converts char into the character set specified for conversions between the database character set and the national character set

TRANSLATE(char_string USING <CHAR_CS character_set | NCHAR_CS character set>)

conn oe/oe

CREATE TABLE translate_tab (
char_col VARCHAR2(100),
nchar_col NVARCHAR2(50));

desc translate_tab

INSERT INTO translate_tab
SELECT NULL, translated_name
FROM product_descriptions
WHERE product_id = 3501;

col char_col format a30
col nchar_col format a30

SELECT * FROM translate_tab;

UPDATE translate_tab
SET char_col = TRANSLATE(nchar_col USING CHAR_CS);

SELECT * FROM translate_tab;

UNISTR

Convert String To The National Character Set (either UTF8 or UTF16)

UNISTR(ch VARCHAR2 CHARACTER SET ANY_CS) RETURN NVARCHAR2;

SELECT UNISTR(ASCIISTR(CHR(128) || 'Hello' || CHR(255)))
FROM dual;

Related Topics

晨星、银河基金业绩排行榜数据转换工具

2009-09-12T11:53:00Z

最新做一些基金业绩比较的工作，必不可少的需要用到晨星、银河这两家证监会认可的大佬发布的业绩排行榜。但却存在一个很大的问题，两家公司的榜单格式都是自定义的，没有统一标准，也不是传统的二维表。为了在此基础上开发的程序比较方便的获取数据，所以用VBA做了如下《评级报告数据转换.xla》的EXCEL插件，较好的将榜单转换为了传统的二维表，这样不管是直接使用，还是导入数据库都比较方便，特分享与大家，有需要的同学可以下载试用。

ORACLE纯SQL实现多行合并一行

2009-07-30T14:15:00Z

项目中遇到一个需求，需要将多行合并为一行。网上查了很多方法，但通常而言都是编写自定义多行文本合并函数，或者对支持的列数具有局限性。最后在英文google中搜到如下比较巧的方法。不用在数据库中增加function，纯SQL一次性搞定，而且扩充性很好，没有列的限制。……

ASP.NET项目添加Log4Net后，发布后无法写日志

2009-07-14T05:48:00Z

最近用.Net新建了一个Webservice，在项目添加Log4Net后，测试状态下一切正常。但一旦发布服务到IIS以后，发现日志不能正常记录了。屡次失败后，偶然想到，难道是文件夹权限的问题。于是尝试为此服务文件夹的已验证用户设置修改和写入权限，日志记录OK！留此备忘。

“必应”不应、“谷歌”不歌

2009-06-19T19:12:00Z

在过去差不多一个月的时间里，先后看到这样两则新闻：1、微软新推的搜索引擎网站bing（必应）http://cn.bing.com/，因搜索结果可能包含YY视频内容，而且不需要进入视频所属网站，直接点击即可播放的便利功能。受到互联网管理部门的直接禁止访问的处罚，中文bing网站中止了很多天。2、谷歌中国的http://www.google.cn,引领搜索时尚的用户输入部分关键字时，得到自动提醒的关键字补充功能。因涉及某些YY关键字自动匹配，以及查询结果中有大量不“河蟹”的内容，也收到了处罚和限期整改的通知。当然，对于公共关系维持、危机公关的处理上，两大公司都及时采取了措施。微软，清洗了大量不和谐的关键字，同时关闭了视频结果直接播放功能，......

你好2009，再见2008，牛年犇犇犇

2009-01-01T03:52:00Z

昨晚和同事们在酒吧狂欢，回家倒头狂睡之后，睁开朦胧的睡眼，2009年已悄然来到。好久没为空间写点什么了，枕边放着笔记本，躺在床上，决定为新年的第一天写上一篇。 2008，给我们带来了不少不好的回忆，天灾人祸。年初的雪灾、西藏事件，刚过去不久，汶川强震又在白天工作时间不期而遇，当温总在北川中学高三临时教室黑板上写...