Technical Development - Tiveloper.

하고 싶습니다.일주일에 한번이라도 괜찮습니다.제대로 한번 해보고 싶은데요..답글 남겨주세요.

CREATE TABLE hire_dates ( id NUMBER(8), hire_date DATE DEFAULT SYSDATE); When you define a table, you can specify that a column be given a default value by using the DEFAULT option. This option prevents numm values from entering the columns if a row is inserted without a value for the column. - Literal, expressions, or SQL functions are legal. ie) SYSDATE, USER - A column name or a pseudocolumn ..

CREATE TABLE hire_dates ( id NUMBER(8), hire_date DATE DEFAULT SYSDATE); When you define a table, you can specify that a column be given a default value by using the DEFAULT option. This option prevents numm values from entering the columns if a row is inserted without a value for the column. - Literal, expressions, or SQL functions are legal. ie) SYSDATE, USER - A column name or a pseudocolumn ..

CREATE TABLE [schema.]table (column datatype [DEFAULT expr][, ...]); - Immediate effect on the database. - record record information in the data dictionary. schema is the same as the owner's name table is the same name of the table DEFAULT expr specifies a default value if a value is omitted in the INSERT statement. column is the name of the column datatype is the column's data type and length *..

CREATE TABLE [schema.]table (column datatype [DEFAULT expr][, ...]); - Immediate effect on the database. - record record information in the data dictionary. schema is the same as the owner's name table is the same name of the table DEFAULT expr specifies a default value if a value is omitted in the INSERT statement. column is the name of the column datatype is the column's data type and length *..

Database ObjectsTable : Stores dataView : Subset of data from one or more tablesSequence : Generates numeric valuesIndex : Improves the performance of some queriesSynonym : Give alternative names to objects Naming rulesGeneral rules that is required for general programming.Case-Insensitive

Database ObjectsTable : Stores dataView : Subset of data from one or more tablesSequence : Generates numeric valuesIndex : Improves the performance of some queriesSynonym : Give alternative names to objects Naming rulesGeneral rules that is required for general programming.Case-Insensitive

로그파일이 3기가나 쌓여 있는것도 모르고, 서버가 해킹 당한줄 알았다. 가상서버 호스팅을 사용하는데, mysql을 위한 공간조차 모자라게 된것이다. 덕분에 몇몇 테이블이 손상이 되어 버렸다. ./mysqlcheck -u아이디 -p비번 --auto-repair -B 디비명 명령어로 겨우 회복시켰다. 아직 불안 불안하다.. 더 두고 봐야할듯..T_T 이런걸 바로 무지에서 오는 고생이라고 하는건가?

NEXTVAL : The NEXTVAL pseudocolumns is used to extract successive sequence numbers from a specified sequence. sequence.NEXTVAL CURRVAL : The CURRVAL pseudocolumn is used to refer to a sequence number that the current user has just generated. After you generated a sequence object, you have to call NEXTVAL first because the initiatied pointer of the sequence object is pointing the head of the obje..

NEXTVAL : The NEXTVAL pseudocolumns is used to extract successive sequence numbers from a specified sequence. sequence.NEXTVAL CURRVAL : The CURRVAL pseudocolumn is used to refer to a sequence number that the current user has just generated. After you generated a sequence object, you have to call NEXTVAL first because the initiatied pointer of the sequence object is pointing the head of the obje..