db2 sql syntax

1. usage of the Case Function(1) Use the following commands: switch-case and if-else if.(2) Syntax:Case [field]When expression then display dataWhen expression then display dataElse display dataEnd(3) percent conversion of Quality Education1) We want to convert the displayed data to ABCDE. The rule is to show A at or above 90 points, B at or above 80 points, and so on. 　　　　 2) The executed SQL statement is: Copy codeThe Code is as follows: Select ID,

This article summarizes the Oracle implementation of page query SQL syntax, collation for everyone for your reference, details are as follows: 1. No order by sort of the wording. (Highest efficiency) After testing, this method costs the lowest, only nested one layer, the fastest! Even if the amount of data query is large, and almost unaffected, the speed is still! The

| | ' Works for ' | | M.first_name | | "| | M.last_nameFrom Employees w,employees mwhere w.manager_id = m.employee_idOrder BY W.first_name;Use the standard SQL syntax execution connection (recommended)( 3 ) Inner Connection ( inner join ... on ... .. )① internal connections for two tablesSelect P.name,pt.nameFrom Products P INNER join Product_types PTOn p.product_type_id = pt.product_type_idOrder BY P.name

Oracle -- SQL syntax Summary -- Statement block declare v_name varchar2 (30): = 'jack' -- defines the variable begin select v_name from dual; exception when others then dbms_output.put_line ('exception occurred '); end; -- if judge declare v_num1 number; v_num2 number; v_result varchar2 (10); begin if v_num1 is null or v_num2 is null then v_result: = 'undefined'; elsif v_num1> v_num2 then v_result: = 'num1

. Customer No. = order. Customer No.Add QueryInsert into customer and order (customer number, company name, order date, tax-included price) Select customer. customer ID, customer. company Name, order. order Date, order. from the customer inner join order on the customer. customer ID = order. customer ID11-3 Action query commandFour action query commands The syntax differences between SQL Server and access

number of person in that country.Select C.countryname,count (p.id) from country as C inner join person as p on C.countryid = P.countryid GROUP BY C.countryn AmeOutput Result:　　　　Now we are adding a condition that requires the population to be sorted in ascending order:Select C.countryname,count (p.id) as Cofrom Country as C inner join person as p in C.countryid = P.countryid GROUP BY C.cou Ntrynameorder by CO ASCOutput Result:　　　　Add a condition that requires that only records with a person num

SQL syntax of MySQLprepare statement bitsCN.com MySQL prepare syntax: PREPAREStatement_nameFROMPreparable_ SQL _statement;/* definition */ EXECUTEStatement_name [USING @ Var_name [, @ var_name]...];/* Execute the preprocessing statement */ {DEALLOCATE | DROP} PREPAREStatement_name/* delete definition */; The PREPARE s

Tags: basic syntax structure PL/SQL1. Branching structureIn PL/SQL, the IF keyword is used as the starting segment of the program for the point structure.There are several branching structures in general:1) If Condition then statement end if;2) If Condition then statementElse then statementEnd If;3) If Condition then statementelsif condition Then statement...Else then statementEnd If;The structure correspon

SQL syntax error ?? Query nbsp; failed: SQLSTATE [42000]: nbsp; Syntax nbsp; error nbsp; or nbsp; access nbsp; violation: nbsp; 1064 nbsp; you SQL syntax error ?? Query failed: SQLSTATE [42000]: Syntax error or access viol

Oracle common SQL syntax set Table:Select * from cat;Select * From tab;Select table_name from user_tables;View:Select text from user_views where view_name = upper (' view_name ');Index:Select index_name, table_owner, table_name, tablespace_name, status from user_indexes order by table_name;Trigger:Select trigger_name, trigger_type, table_owner, table_name, status from user_triggers;Snapshot:Select owner

: Host variable Indicator , Item Separator " Quoted identifier delimiter = Relational operators @ Remote Access Indicator ; Declaration Terminator, Statement Terminator := Assignment operators = Operator Association || Connection operators, string connections ** Exponentiation operator La

Mysql user authorization, database permission management, SQL syntax details, mysql permission management Mysql user authorization, database permission management, and SQL syntax-NiceCui 1. Authorize the primary SQL // ALL permissions of a database after ALL + PRIVILEGES

');//query all the records in the Tacher table; Select is the most common, and you can add various conditions to match the appropriate records later ./*includes and between * * to *; where **order by **group by * * Havingleft join on **;union **limit and other syntax;*/Select* fromTeacher　　Database injection of a very old technology, the database is a business or a Web site soul, if your database has been maliciously changed, then we do not have Mimi

Your current location: homepage tutorial Programming Development mssql database SQLServer basic syntax instance application (3) SQLServer basic syntax instance application (3) thanks to 3lian8 delivery time: Source: triple tutorial 3. Develop applications 1. sort by surname strokes: Select * FromTableNameOrderByCustomerName Your current location: Home> tutorial> programming and development> mssql database>

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

column col type Note: The column will not be deleted after it has increased. The data type can not be changed when the column in the DB2 is added, and the only change is the length of the varchar type. 7. Description: Add primary key: Alter table TabName Add primary key (COL) Description Delete primary key: Alter table tabname drop primary key (COL) 8. Description: Creating index: Create [unique] index idxname on tabname (col ...) Deleting in

REPLICATION option can be used as a stored procedure filter and can only be run during the replication process. This option cannot be used with the WITH RECOMPILE option.11, asSpecifies the action to be run by the procedure.12, Sql_statementThe random number and type of Transact-SQL statements to include in the procedure. But there are some limitations.13, Nis a placeholder that indicates that this procedure can include multiple Transact-

*2.pl/sql Basic Syntax 1) anonymous block a piece of PL/SQL that cannot be stored in the database. The basic structure is as follows: DECLARE//Variable declaration definition area (can be omitted) BEGIN//Business Process area EXCEPTION//exception handling area (can be omitted) END 2) Comment --in single-line comment Tolerance/* Multiline Comment content */ 3) Co

Note: The following content is executed in the sqlserver2000 query analyzer, which is a comment. You can save the following content as a text file suffixed with SQL, and then open it in the sqlserver2000 query analyzer, This article focuses on some SQL query syntax and concepts, so some queries may not have any practical significance, just to illustrate the query

language. The biggest difference between it and the DML language is that DML is just an operation on the table's internal data, not the table's fixedChanges in semantics, structure, and other objects are not involved. DDL statements are more used by database administrators (DBAs),Common developers are rarely used.Here are some examples of how common DDL statements are used in MySQL. --Create a table--Create TABLE EMP (ename varchar), HireDate date,sal Decimal (10,2), Deptno Int (2));--View