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-- Transaction controlCommit -- end the current transactionRollback -- abort the current transactionSET transaction -- define the data access features of the current transaction-- Program SQLDeclare -- set the cursor for the queryExplain -- describe the data access plan for queryOpen -- open a cursor for retrieving query resultsFetch -- retrieve a row of query resultsClose -- close the cursorPrepare -- prepare SQL statements for dynamic executionExecu

Permissions-- Transaction controlCommit -- end the current transactionRollback -- abort the current transactionSET transaction -- define the data access features of the current transaction-- Programmatic SQLDeclare -- set the cursor for the queryExplain -- describe the data access plan for queryOpen -- open a cursor for retrieving query resultsFetch -- retrieve a row of query resultsClose -- close the cursorPrepare -- prepare SQL statements for dynam

access features of the current TRANSACTION -- Programmatic SQL DECLARE -- set the cursor for the query Explain -- describe the data access plan for query OPEN -- OPEN a cursor for retrieving query results FETCH -- retrieve a row of query results CLOSE -- CLOSE the cursor PREPARE -- prepare SQL statements for dynamic execution EXECUTE -- dynamically execute SQL s

The Oracle tutorials being looked at are: Oraclepl/sql single-line functions and group functions. A 1 function is a program that has 0 or more parameters and has a return value. In SQL, Oracle builds a series of functions that can be called SQL or PL/SQL statements, and functions fall into two main categories: 2 3 sing

To create a database:1 CREATE DATABASETest--The name of the database to be created2 on PRIMARY3 (4 --specific description of the database file5NAME='Test_data',--logical name of the master data file6FILENAME='E:\project\Test_data.mdf',--physical name of the master data file7SIZE=5MB,--Initial size of master data file8MAXSIZE=100MB,--maximum growth of the master data file9FileGrowth= the% --growth rate of master data filesTen ) One LOG on A ( - --the specific

The ORACLE tutorial is: OraclePL/SQL single-row functions and group functions. A 1 function is a program with zero or multiple parameters and a return value. Oracle has a series of built-in functions in SQL, which can be called SQL or PL/SQL statements. functions are mainly divided into two categories: 2 3 single row F

-Deny User Access Revoke -- revoke User Access Permissions -- Transaction control Commit -- end the current transaction Rollback -- abort the current transaction SET transaction -- define the data access features of the current transaction --ProgramSQL Declare -- set the cursor for the query Explain -- describe the data access plan for query Open -- open a cursor for retrieving query results Fetch -- retrieve a row of query results Close -- close the cursor Prepare -- pre

', Col_name (object_id (' Student '), 2)); --The column data type length Select Col_length (' Student ', Col_name (object_id (' Student '), 1)); --return type name, type ID Select Type_name (type_id (' varchar ')), type_id (' varchar '); --Returns the column type length Select ColumnProperty (object_id (' Student '), ' name ', ' PRECISION '); --Returns the index where the column is located Select ColumnProperty (object_id (' Student '), ' sex ', ' ColumnId '); 5. String function Select ASCII ('

control COMMIT--End current transaction ROLLBACK--Abort current transaction SET TRANSACTION--Defining the current transaction data access characteristics --Programmed SQL DECLARE--Set cursors for queries Explan--Describes a data access plan for a query Open--Retrieving query results opens a cursor FETCH--Retrieves a row of query results Close--Closing cursors PREPARE-Preparing SQL statements for dynamic ex

for the SQL Server system, the user-defined data type cannot be used here.2) length is used to specify how long the data is, and the default value is 30.3) converts a char or varchar type to an integer type such as int or samllint, and the result must be a numeric value with a plus or minus sign.4) The text type is converted to char or varchar type up to 8,000 characters, that is, the char or varchar data type is the maximum length.5) The data stored

Common SQL Syntax Functions Code:Functions of Transact SQL statements-- Data OperationsSELECT -- retrieve data rows and columns from database tablesINSERT -- add new data rows to the database tableDELETE -- DELETE data rows from a database tableUPDATE -- UPDATE data in the database table-- Data DefinitionCreate table -- CREATE a database TABLEDrop table -- delete a TABLE from a databaseAlter table -- modify

char (65 ); Select nchar (65 ); Select nchar (45231 ); Select nchar (32993); -- unicode conversion character Select unicode ('A'), unicode ('中'); -- returns the unicode encoding value. Select soundex ('hello'), soundex ('World'), soundex ('word '); Select patindex ('% A', 'ta'), patindex ('% ac %', 'jack'), patindex ('dex % ', 'dexjack '); -- match Character ind

col_length ('student ', col_name (object_id ('student'), 1 ));-- Return type name and type idSelect type_name (type_id ('varchar '), type_id ('varchar ');-- Return column type LengthSelect columnProperty (object_id ('student '), 'name', 'precision ');-- Returns the index location of the column.Select columnProperty (object_id ('student '), 'sex', 'columnid ');5. String FunctionsSelect ascii ('A'); -- converts ascii valuesSelect ascii ('A ');Select char (97); -- ascii value conversion characterS

Access Permissions -- Transaction control Commit -- end the current transaction Rollback -- abort the current transaction SET transaction -- define the data access features of the current transaction -- Programmatic SQL Declare -- set the cursor for the query Explain -- describe the data access plan for query Open -- open a cursor for retrieving query results Fetch -- retrieve a row of query results Close -- close the cursor Prepare -- prepare

-- Transaction controlCommit -- end the current transactionRollback -- abort the current transactionSET transaction -- define the data access features of the current transaction-- Program SQLDeclare -- set the cursor for the queryExplain -- describe the data access plan for queryOpen -- open a cursor for retrieving query resultsFetch -- retrieve a row of query resultsClose -- close the cursorPrepare -- prepare SQL statements for dynamic executionExecu

Transact_ SQL small manual ******************** -- Sentence skill -- Data Operations Select -- retrieve data rows and columns from database tables Insert -- add new data rows to the database table Delete -- delete data rows from a database table Update -- update data in the database table -- Data Definition Create Table -- create a database table Drop table -- delete a table from a database Alter table -- modify the database tabl

from a databaseCreate procedure -- CREATE a stored PROCEDUREDrop procedure -- delete a stored PROCEDURE from a databaseCreate trigger -- CREATE a TRIGGERDrop trigger -- delete a TRIGGER from a databaseCreate schema -- Add a new SCHEMA to the databaseDrop schema -- delete a SCHEMA from the databaseCreate domain -- CREATE a Data Value DOMAINAlter domain -- change DOMAIN definitionDrop domain -- delete a DOMAIN from the database-- Data ControlGRANT -- GRANT the user access permissionDENY-DENY User

= SQL statement collection =- -- Sentence -- skill -- -- Data OperationsSelect -- retrieve data rows and columns from database tablesInsert -- add new data rows to the database tableDelete -- delete data rows from a database tableUpdate -- update data in the database table -- Data DefinitionCreate Table -- create a database tableDrop table -- delete a table from a databaseAlter table -- modify the database table structureCreate View -- create a viewD

PL/SQL single-row functions and group functions A function is a program with zero or multiple parameters and a return value. Oracle has a series of built-in functions in SQL, which can be called SQL or PL/SQL statements. functions are mainly divided into two categories:Single Row Function Group functions This article w

SQL Statement Collection --statement function --data Operation SELECT--Retrieve data rows and columns from a database table INSERT--Add new data rows to a database table Delete--delete data rows from a database table UPDATE-- Update data in a database table --Data definition CREATE table--Creates a database table drop table--Deletes a table from the Database ALTER table--Modify the database table structure CREATE VIEW-- Create a View Drop vie