A pseudo-column is an Oracle assigned value (pseudo-field) used in the same context as an Oracle Database column, but not stored on disk. SQL and PL/SQL recognizes the following SQL pseudocolumns, which return specific data items: SYSDATE, SYSTIMESTAMP, ROWID, ROWNUM, UID, USER, LEVEL,...
Oracle CQL supports the following pseudocolumns: Section 3.2, "ELEMENT_TIME Pseudocolumn" 3.2ELEMENT_TIME Pseudocolumn TheELEMENT_TIMEpseudocolumn returns the timestamp value associated with a given stream element as ajava.lang.Math.Bigint(Long). ...
Oracle For Beginners -INDEXING, CLUSTERING, SEQUENCE AND PSEUDO COLUMNSorecal sequence seminar
The version query pseudocolumns are valid only in Oracle Flashback Version Query, which is a form of Oracle Flashback Query. The version query pseudocolumns are: VERSIONS_STARTSCNandVERSIONS_STARTTIME: Starting System Change Number (SCN) orTIMESTAMPwhen the row version was created. This pseudoco...
select distinct column_value from table(sys.odcinumberlist(1,1,2,3,3,4,4,5)) refer: http://docs.oracle.com/cd/B19306_01/server.102/b14200/pseudocolumns004.htm http://stackoverflow.com/questions/10353969/how-can-i-select-from-list-of-values-in-oracle...
Oracle GaussDB 1 connect_by_iscycle Supported 2 connect_by_isleaf Supported 3 LEVEL pseudocolumn Supported Sequence Pseudocolumns Table 2Sequences No. Oracle GaussDB Difference 1 currval Supported, with differences It is implemented as a function in GaussDB. ...
Some databases have "hidden" columns that can be referenced in a query, but won't show up (by default) in a SELECT *. Oracle calls these "pseudocolumns", and that name seems to have stuck with other databases too. Personally I think "hid...
DatabaseMetaData.getPseudoColumns(java.lang.String, java.lang.String, java.lang.String, java.lang.String) Enum Constant Summary Enum Constants Enum Constant描述 NO_USAGE_RESTRICTIONS 伪/隐藏列的使用没有限制。 SELECT_LIST_ONLY 伪/隐藏列只能在SELECT列表中使用。 USAGE_UNKNOWN 无法确定伪/隐藏列...
WHERE employee_id = employee_id_in; END; The SELECT * syntax tells Oracle Database to fetch all the columns in the table. I can also use %ROWTYPE to declare a record that has the same structure as a SELECT statement in a cursor. This is especially helpful for fetching either a subset...
columns (each row corresponding to a polynomial \(p_{\vec {\phi }_l,x_l,j} \cdot t_{j+1}^k\) ), then we can write this as: $$\begin{aligned} \mathsf {t} = \varvec{m} \odot \vec {u} . \end{aligned}$$ but since the polynomials \(p_{\vec {\phi }_l,x_l,j}...