有其高竿的元件使用
他的 License 一般都是 Apache License 所以 不太需要 有其他的 Payment 只要學與用
減少很多在 資料整合與 訊息交換上的 一堆麻煩。
它存在 java 與 perl 的程式產生器 所以 只要懂Java 與 eclipse 上手還算簡單,
在 資料庫 建置上 我建議 下列 步驟
- 建立連結
- 建立 metadata
- 建置 Job
- 建置metadata
- 建置Job
schema.table system==>
schema/table
Function | Description |
---|---|
CURDATE() CURTIME() | Returns the system's current date/time. |
DATE(D) DATE(T) | Converts a string representation of a date/time into into a date/time value. |
DAY(D) | Returns the day(1-31) from the date D. |
WEEK(D) | Returns the week (1-54) from the date D. |
MONTH(D) | Returns the month (1-12) from the date D. |
YEAR(D) | Returns the year from the date D. |
DAYOFWEEK(D) | Returns the week day (1-7) from the date D where 1 is Sunday. |
DAYOFWEEK_ISO(D) | Returns the week day (1-7) from the date D where 1 is Monday. |
DAYOFYEAR(D) | Returns the number of the day, in a year (1-366). |
HOUR(T) | Returns the hour (0-24) from the time T. |
MINUTE(T) | Returns the minute from the time T. |
SECOND(T) | Returns the second from the time T. |
MICROSECOND(T) | Returns the microsecond from the time |
CHAR(N) | Returns the the string representation of the number N. |
CHAR_LENGTH(S) | Returns the length of a string. |
CONCAT(S1, S2) | Concatenates S1 with S2. |
SUBSTR(S, I, L) | Returns a substring of S, starting at index I of lenght L. |
LOWER(S) | Returns the lowercase representation of S. |
UPPER(S) | Returns the uppercase representation of S. |
TRIM(S) | Removes spaces from the beggining and and of S. |
RTRIM(S) LTRIM(S) | Removes spaces at the begging (right) or end (left) of S. |