logmein comm

;";OleDbConnection conn = new OleDbConnection (strConn );OleDbCommand comm = new OleDbCommand ();Comm. CommandText = "SELECT * FROM Users ";Comm. CommandType = CommandType. Text;Comm. Connection = conn;If (conn. State! = ConnectionState. Open){Conn. Open ();DataSet ds = new DataSet ();OleDbDataAdapter da = new OleDbDa

1. Call the stored procedure without input/output parameters Create procedure testproc As Select pub_id, title_id, price, pubdate From titles Where price is not null Order by pub_id Use the following program to call this stored procedure. When calling this stored procedure, you must tell the command object that you want to call the stored procedure. Sqlconnection conn;Protected void page_load (Object sender, eventargs E){Conn = new sqlconnection ("Server = localhost; database = pubs; uid = sa;

The common SQL query statement looks like this: First, simple query statement 1. View table structure SQL>DESC EMP; 2. Query all Columns Sql>select * from EMP; 3. Query specified column Sql>select empmo, ename, Mgr from EMP; Sql>select DISTINCT Mgr from EMP; Show only items with different results 4. Query specified line Sql>select * from emp WHERE job= ' clerk '; 5. Using an arithmetic expression Sql>select ename, SAL*13+NVL (comm,0) from

) Statement: Our four-day time, mainly in the work of "Java EE Engineer" angle, the operation of the database "common" function -The following code is to display the EMP table to do the setting col empno for 9999; Col ename for A10; Col job for A10; Col Mgr for 9999; Col hiredate for A12; Col Sal for 9999; Col Comm for 9999; Col Deptno for; Set pagesize; Col tname for A20; Set pagesize; --Create a new table new_emp, copy the structure and data fr

First, simple query statements 1. View table structure SQL>DESC EMP; 2. Querying all Columns Sql>select * from EMP; 3. Querying a specified column Sql>select empmo, ename, Mgr from EMP; Sql>select DISTINCT Mgr from EMP; Show only items with different results 4. Querying a specified row Sql>select * from emp WHERE job= ' clerk '; 5. Using an arithmetic expression Sql>select ename, SAL*13+NVL (comm,0) from EMP; NVL (

function, a C call, and so on. It is worth noting that the general user to create the function index, must have the global QUERY rewrite and create any index permission. Otherwise, you cannot create a function index, see the following example:Example 1: Index of the uppercase conversion function for the ename column of the EMP table idx:CREATE INDEX idx on EMP (UPPER (ename));This allows you to use the following query statements:SELECT * from EMP WHERE UPPER (ename) like ' joh% '; Example 2: In

. These expressions can be an arithmetic expression, an SQL or a/PL function, a C call, and so on. It is worth noting that the general user to create the function index, must have the global QUERY rewrite and create any index permission. Otherwise, you cannot create a function index, see the following example:Example 1: Index of the uppercase conversion function for the ename column of the EMP table idx:CREATE INDEX idx on EMP (UPPER (ename));This allows you to use the following query statements

is, only two strings, three strings concatenated, two concat are required.Demo: Listed in "Name: Salary" form SELECT CONCAT (CONCAT (ename, ': '), Sal) from EMP; L | | Connection symbols, you can concatenate multiple stringsDemo: Listed in the form "Name: Performance: Salary" SELECT ename| | ': ' | | comm| | ': ' | | Sal from EMP; Demo: List The above information in an alias-empinfo manner

Tags: run select int Manage select to implement ARC Update 5.61. View table structure SQL>DESC EMP; 2. Querying all Columns Sql>select * from EMP; 3. Querying a specified column Sql>select empmo, ename, Mgr from EMP; Sql>select DISTINCT Mgr from EMP; Show only items with different results 4. Querying a specified row Sql>select * from emp WHERE job= ' clerk '; 5. Using an arithmetic expression Sql>select ename, SAL*13+NVL (comm,0) from EMP; NVL (

First, simple query statements1. View table structureSQL>DESC EMP;2. Querying all ColumnsSql>select * from EMP;3. Querying a specified columnSql>select empmo, ename, Mgr from EMP;Sql>select DISTINCT Mgr from EMP; Show only items with different results4. Querying a specified rowSql>select * from emp WHERE job= ' clerk ';5. Using an arithmetic expressionSql>select ename, SAL*13+NVL (comm,0) from EMP;NVL (comm

Tags: symbol int same like an arc rom false divFirst, simple query statements 1. View table structure SQL>DESC EMP; 2. Querying all Columns Sql>select * from EMP; 3. Querying a specified column Sql>select empmo, ename, Mgr from EMP; Sql>select DISTINCT Mgr from EMP; Show only items with different results 4. Querying a specified row Sql>select * from emp WHERE job= ' clerk '; 5. Using an arithmetic expression Sql>select ename, SAL*13+NVL (comm,0) from

First, simple query statements1. View table structureSQL>DESC EMP;2. Querying all ColumnsSql>select * from EMP;3. Querying a specified columnSql>select empmo, ename, Mgr from EMP;Sql>select DISTINCT Mgr from EMP; Show only items with different results4. Querying a specified rowSql>select * from emp WHERE job= ' clerk ';5. Using an arithmetic expressionSql>select ename, SAL*13+NVL (comm,0) from EMP;NVL (comm

, with a condition of comm equals 0SELECT * from scott.emp WHERE comm = 0;--Query all columns of the EMP table for the Scott user, conditional comm equals an empty stringSELECT * from scott.emp WHERE comm = ';--Query all columns of the EMP table of the Scott user, conditional comm