原创 Oracle: check the structure of a table
Oracle: check the structure of a table named test_table, just using the follwoing command: describe test_table; th
2020-07-07 06:44:23
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原创 Using JQuery to manipulate HTML label
Two ways manipulating HTML label using JQuery: 1. $("Label_Name"); 2. $('#Label_Id_Name');
2020-07-07 06:44:23
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原创 Oracle: Concatenate string
Prepare data: CREATE TABLE student ( "ID" VARCHAR2(4 BYTE) primary key, "FIRST_NAME" VARCHAR2(10 BYTE), "LAST_N
2020-02-22 18:50:40
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原创 oracle fuzzy inquery, using ignore case.
Here is an example: Prepare data: create table fruit ( id number(4) primary key, name varchar2(150) ); Ins
2020-02-22 18:50:40
原创 Understanding NUll values of Oracle
A NULL value in oracle database table is not representing a blank string,
2020-02-22 18:50:40
原创 About Java Exception
The java programing language provides three kinds of throwables: checked exception, run-time exceptions and errors. Che
2020-02-22 18:50:40
原创 Understanding basic database terminology
A database consists of tables and columns. Database Design Terminology Logical/Relational Logical/Object-Oriented
2020-02-22 18:50:40
原创 Windows下刪除.svn文件夾的最簡易方法
建立一個文本文件，取名爲kill-svn-folders.reg（擴展名由txt改爲reg），內容如下： Windows Registry Ed
2020-02-22 18:50:40
原创 Oracle: Select constant as a column
Prepare data: CREATE TABLE fruit ( "ID" NUMBER(4,0), "NAME" VARCHAR2(50 BYTE), "PRICE" NUMBER(4,2) )
2020-02-22 18:50:40
原创 修改Oracle SQL Developer的時間格式
打開Oracle SQL Developer, 選擇 Tools --> Preferences --> Database --> NLS-->
2020-02-22 18:50:40
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原创 Oracle backup one table to another table.
In Oracle, if you want to backup a table named table1 to another table named table1_backup, you can use the following
2020-02-22 18:50:40
原创 The execute sequence when using the WHERE and GROUP BY Clauses Together
The WHERE clause first filters the rows returned, then the remaining rows are grouped into blocks by the GROUP BY cla
2020-02-22 18:50:40
原创 Synchronize access to shared mutable data
The synchronized keyword ensures that only a single thread will execute a statement or block at a time. Many programme
2020-02-22 18:50:40