[英]How to execute different multiple SQL statements using OracleCommand C#
我正在嘗試使用 OracleCommand 執行不同的 SQL 語句。
var conn = new OracleConnection("User Id=SYSTEM;Password=mw;Data Source=SampleDataSource");
// Open the connection
if (conn.State != ConnectionState.Open)
conn.Open();
string sql = @"
DROP TABLE CUSTOMERS;
CREATE TABLE CUSTOMERS (
ID INT NOT NULL PRIMARY KEY,
NAME VARCHAR(12) NOT NULL,
AGE INT,
ADDRESS VARCHAR(12)
);
INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (1, 'Mark', 28, 'NY');
INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (2, 'John', 39, 'LA');
INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (3, 'Andy', 48, 'CA');
INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (4, 'Allan', 53, 'LA');
";
var cmd = new OracleCommand(sql, conn);
try
{
cmd.ExecuteNonQuery();
}
catch (OracleException e)
{
error = e.Message;
}
finally
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
}
}
我收到以下異常。
ORA-00933: SQL 命令未正確結束
當我在 BEGIN、END 塊中包含多個語句時,我得到以下異常。
ORA-06550:第 2 行,第 1 列:PLS-00103:在期望以下之一時遇到符號“DROP”:
(開始案例聲明退出 goto if 循環 mod null pragma raise return select update while with << continue close current delete fetch lock insert open rollback savepoint set sql execute commit for all merge pipe purge json_exists json_value json_query json_object json_array
立即執行將使您能夠執行多個語句。
OracleConnection con = new OracleConnection("User Id=SYSTEM;Password=mw;Data Source=SampleDataSource");
if (con.State != ConnectionState.Open)
con.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = con;
cmd.CommandText =
"begin " +
" execute immediate 'DROP TABLE CUSTOMERS';" +
" execute immediate 'CREATE TABLE CUSTOMERS (ID INT NOT NULL PRIMARY KEY,NAME VARCHAR(12) NOT NULL, AGE INT, ADDRESS VARCHAR(12))';" +
" execute immediate 'INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (1, 'Mark', 28, 'NY')';" +
" execute immediate 'INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (2, 'John', 39, 'LA')';" +
" execute immediate 'INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (3, 'Andy', 48, 'CA')';" +
" execute immediate 'INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (4, 'Allan', 53, 'LA')';" +
"end;"
cmd.CommandType = CommandType.Text;
try
{
cmd.ExecuteNonQuery();
}
catch (OracleException e)
{
error = e.Message;
}
finally
{
if (con.State == ConnectionState.Open)
{
con.Close();
}
}
為每個語句使用一個命令可能會更好。 下面是一個dapper的例子。
const string dropTableCustomers = "DROP TABLE CUSTOMERS";
const string createTableCustomers = @"
CREATE TABLE CUSTOMERS (
ID INT NOT NULL PRIMARY KEY,
NAME VARCHAR(12) NOT NULL,
AGE INT,
ADDRESS VARCHAR(12))";
const string insertCustomerMark = "INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (1, 'Mark', 28, 'NY')";
const string insertCustomerJohn = "INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (2, 'John', 39, 'LA')";
using (var connection = new OracleConnection("User Id=SYSTEM;Password=mw;Data Source=SampleDataSource")) {
connection.Open();
connection.Execute(dropTableCustomers);
connection.Execute(createTableCustomers);
connection.Execute(insertCustomerMark);
connection.Execute(insertCustomerJohn);
}
如果您需要交易,您可以執行以下操作:
public static class DbConnectionFactory {
public static IDbConnection Create(string connectionString) {
var connection = new OracleConnection(connectionString);
connection.Open();
return connection;
}
}
const string dropTableCustomers = "DROP TABLE CUSTOMERS";
const string createTableCustomers = @"
CREATE TABLE CUSTOMERS (
ID INT NOT NULL PRIMARY KEY,
NAME VARCHAR(12) NOT NULL,
AGE INT,
ADDRESS VARCHAR(12))";
const string insertCustomerMark = "INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (1, 'Mark', 28, 'NY')";
const string insertCustomerJohn = "INSERT INTO CUSTOMERS (ID,NAME,AGE,ADDRESS) VALUES (2, 'John', 39, 'LA')";
using (var connection = DbConnectionFactory.Create("User Id=SYSTEM;Password=mw;Data Source=SampleDataSource"))
using (var transaction = connection.BeginTransaction()) {
connection.Execute(dropTableCustomers);
connection.Execute(createTableCustomers);
connection.Execute(insertCustomerMark);
connection.Execute(insertCustomerJohn);
transaction.Commit();
}
strSQL = @"Insert all into NEW1(a,b) VALUES(1,2) "
+ "INTO NEW1(a,b) VALUES(2, 3) "
+ "INTO NEW1(a,b) VALUES(3, 4) "
+ "INTO NEW2(a,b) VALUES(9, 9) "
+ "INTO NEW2(a,b) VALUES(6, 6) "
+ "SELECT * FROM DUAL";
我使用里面有 DbScript Class 的 DevArt 庫解決了這個問題,你可以在這個 URL 找到一個用法示例: DbScript Class
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