oracle sql keywords list

// View all database objects in the Oracle databaseSelect * From dba_objects// View database objects that meet specific conditionsSelect * From dba_objects where owner = 'user1' // View database version informationSelect * From product_component_versionFor example, the output information is as follows:Product Version statusNlsrtl 9.0.1.1.1 ProductionOracle9i Enterprise Edition 9.0.1.1.1 ProductionPL/SQL 9

SQL statements for Oracle databases use theSCOTT e-r Model DiagramDEPT Department Table EMP Employee table BONUS Bonus Table GRADE salary GradeDEPTNO Department number EMPNO employee number ENAME employee name GRADE salary GradeDname Department name ename employee name Job Job position Losal minimum salaryLOC Department Position job Jobs SAL Payroll hisal most highly paidMGR leader Number COMM BonusHireDat

Tags: sequential single quote Start full application instance field name commit tableThe data manipulation language, manipulation language, which checks for DML, mainly includes the search (SELECT), insert, UPDATE, delete, is a core part of SQL. A DML begins a transaction, and the next DML is the statement in the same transaction until it commits (commits) or rolls back (ROLLBACK). Let's describe the syntax and instance resolution of INSERT, UPDATE, d

Label:"Shared sql: 1. Unified writing Style 2. Using bound variables "To find the SQL statement that is not shared: Look for SQL statements with smaller executions in v$sql to see if these SQL statements are executed frequently. Select Sql_fulltext from V$

Oracle/MySql/SQL Sqlserver paging query, oraclesqlserverBrief Introduction A brief summary of the paging query statements for Oracle, MySql, and SQL Server databases. Oracle paging Query For example, two pieces of data are displayed on each page. Now you need to query the s

"Hs_fds_connect_info=[192.168.199.245]//bwonlineHs_fds_connect_info=192.168.199.245:1433//bwonlineHs_fds_connect_info=192.168.199.245//bwonlineSecond, the monitoring file listener configuration1. Directory of listening files: Listener.ora file under Oracle_home/network/administrator2. File format Description: The file is divided into two parts: Sid_list_listener and ListenerSid_list_listener is the list of listening SIDs, listener is the information o

Oracle journey (ii) SQL statement query settings such as t_chmo_order_opera p, business table t_chmo_teruser u, user table t_chmo_province, Province table t_chmo_opera_price r price list ----- value-added business details select p. oo_source_num as phone number, r. opera_price as amount, cp_province_name as region, p. oo_create_time as date, u. ct_category as ope

cannot give the literal value null to EXPRESSION1,2. Coalesce[,k??? ' Les] FunctionsThe COALESCE function compares each expression in the expression list to null and returns the value of the first non-null expression. The COALESCE function has the following structureCOALESCE (Expression1,expression2,........., expressionn)If expression1 equals null, EXPRESSIOIN2 is computed. If the expression2 evaluates to NULL, the function returns EXPRESSION2 and r

SQL: Oracle 11g create table, function, trigger, sequence, 11 gtrigger -- Place directory drop table BookPlaceList; create table BookPlaceList (BookPlaceID int primary key, -- NUMBERBookPlaceName nvarchar2 (500) not null, BookPlaceCode varchar (100) null, -- location parameter BookPlaceParent INT null -- BookPlaceKindId nvarchar (500) null -- place DIRECTORY parameter ID); select * from BookPlaceList; --- a

is used, be sure to explicitly delete all temporary tables at the end of the stored procedure, TRUNCATE table first, and then drop table, which avoids longer locking of the system tables.25. Avoid using cursors as much as possible, because cursors are inefficient and should be considered for overwriting if the cursor is manipulating more than 10,000 rows of data.26. Before using a cursor-based method or temporal table method, you should first look for a set-based solution to solve the problem,

have a large temporary segment to maximize the performance of I/O. The partitions in the temporary section need to be swapped into memory for a hash join. At this time the cost is close to the full table Scan small table + partition number * Full table scan large table cost and.As for the two tables are partitioned. The advantage is the ability to use parallel query, where multiple processes join at the same time for different partitions and then merge.But complicated.When using a HASH join, th

Enter sqlldr. If no parameters are followed, a simple description of all command line parameters and their default values are displayed. (You can also query some parameters quickly when you forget them ): Valid Keywords: Userid -- Oracle username/passwordControl -- control file nameLog -- log file nameBad -- bad file nameData -- data file nameDiscard -- discard file nameDiscardmax -- number of discards to a

grouping is constrained with having , and The result of select is obtained. Multi-Table QuerySelect from emp e, Test T; -- Cartesian set, cross-queryConnection QueryINNER JOIN : INNER JOIN returns common data between multiple tables Select from where = Dept.deptno;Select Inner Join on =External connection : Left join: The result of the left join data is the main table, and the right table is empty if it doesn't exist in the left table!Select S.*from leftjoinon= C.sidRight Join Fully conn

1. First create the package with PL/SQL1 Create or ReplacePackage Excutebatchoperate2 as3Type Sqlstr_array is Table of varchar2( +)Index byBinary_integer;4 procedureExcutebulkdata (sqlstrinchSqlstr_array);5 EndExcutebatchoperate;2. Create a stored procedure within Packagebody1 Create or ReplacePackage Body Excutebatchoperate2 as3 procedureExcutebulkdata (sqlstrinchSqlstr_array)4 as5 begin6 forIinch 1.. Sqlstr.CountLoop7 Executeimmediate SQLSTR (i);8 EndLoop;9 EndExcu

* from User_errors;Oracle always places software such as stored procedures, functions, and so on in the system table space.13. Constraints:(1) The constraint is associated with the table and can be created, modified, and deleted in the CREATE TABLE or ALTER TABLE table_name add/drop/modify.Constraints can be temporarily suppressed, such as:ALTER TABLE Book_exampleDisable constraint book_example_1;ALTER TABLE Book_exampleEnable constraint book_example

Oracle dynamic SQL, oraclesql The syntax for executing dynamic SQL statements is: Excute immediate dynamic SQL statement using binding parameter list returning into output parameter list Test Table: student (id, name, age );

Tags: blog io ar sp on log BS asThe syntax for executing dynamic SQL is:Excute immediate Dynamic SQL statement using-bound parameter list returning into output parameter listTest table: Table: Student (id,name,age);Example: StorageCreate or Replace procedure P_stu_info (s_id number) is v_name varchar2 (n); V_age number;begin Execute immediate ' select Name,ag

SQL: charindex ('string', field)> 0 charindex ('admin', MUserID)> 0Oracle: instr (field, 'string',)> 0 instr (MUserID, 'admin',)> 0The Instr function in Oracle is used in the project. By the way, I learned this knowledge carefully.In Oracle, you can use the Instr function to determine whether a string contains specified characters.Its syntax is:Instr (string, sub

Locate the Oracle installation directory, locate the Tnsnames.ora file under the Admin folder, open the file, and add the database you want to connect to, example:tht = (DESCRIPTION = (Address_list = (ADDRESS = (PROTOCOL = TCP) (HOST = 10.10.124.226) (PORT = 1521)) (CON Nect_data = (service_name = ORCL)))Note: tht for themselves as a linked database name, anything can be, the rest of the address and port number and service_name follow the database con

Tags: use LCT method sum Sele rate logs ACL selectIn everyday SQL queries, we need to process the data that we want to query, and then query it in the pre-processed data. At this point we need to use the temporary table, pre-processing the data into the temporary table, and then in the temporary list according to the conditions we need to query.Let's say we have an income table: Incoming, the fields are: id