Top 15 Pstmt The 189 Detailed Answer

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mysql jdbc pstmt
mysql jdbc pstmt


PreparedStatement (Java Platform SE 7 )

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  • Summary of article content: Articles about PreparedStatement (Java Platform SE 7 ) PreparedStatement pstmt = con.prepareStatement(“UPDATE EMPLOYEES SET SALARY = ? WHERE ID = ?”); pstmt.setBigDecimal(1, 153833.00) pstmt.setInt(2, 110592). …
  • Most searched keywords: Whether you are looking for PreparedStatement (Java Platform SE 7 ) PreparedStatement pstmt = con.prepareStatement(“UPDATE EMPLOYEES SET SALARY = ? WHERE ID = ?”); pstmt.setBigDecimal(1, 153833.00) pstmt.setInt(2, 110592). java.sql.PreparedStatement interfaceexecuteQuery()executeUpdate()setNull()setBoolean()setByte()setShort()setInt()setLong()setFloat()setDouble()setBigDecimal()setString()setBytes()setDate()setTime()setTimestamp()setAsciiStream()setUnicodeStream()setBinaryStream()clearParameters()setObject()execute()addBatch()setCharacterStream()setRef()setBlob()setClob()setArray()getMetaData()setURL()getParameterMetaData()setRowId()setNString()setNCharacterStream()setNClob()setSQLXML()
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PreparedStatement (Java Platform SE 7 )
PreparedStatement (Java Platform SE 7 )

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Remote User Information Record

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  • Summary of article content: Articles about Remote User Information Record pstmt.upload, Determines if the user can send files from this local node. If a file open exit is in use, this parameter is passed to the exit, but it is not … …
  • Most searched keywords: Whether you are looking for Remote User Information Record pstmt.upload, Determines if the user can send files from this local node. If a file open exit is in use, this parameter is passed to the exit, but it is not … Files, strong access control file
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Remote User Information Record
Remote User Information Record

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Hướng dẫn Java JDBC, Ví dụ với PreparedStatement trong JDBC

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  • Summary of article content: Articles about Hướng dẫn Java JDBC, Ví dụ với PreparedStatement trong JDBC prepareStatement(sql);; for (User user : listUser) {; pstmt.setString(1, user.getName());; pstmt.setString(2, user. …
  • Most searched keywords: Whether you are looking for Hướng dẫn Java JDBC, Ví dụ với PreparedStatement trong JDBC prepareStatement(sql);; for (User user : listUser) {; pstmt.setString(1, user.getName());; pstmt.setString(2, user. Hướng dẫn Java JDBC, Ví dụ với PreparedStatement trong JDBC. PreparedStatement là một trong ba loại interace thực thi câu lệnh truy vấn SQL trong JDBC API. PreparedStatement có hiệu năng lớn hơn Statement nhưng thấp hơn CallableStatement.
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Network Programming

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Hướng dẫn Java JDBC, Ví dụ với PreparedStatement trong JDBC
Hướng dẫn Java JDBC, Ví dụ với PreparedStatement trong JDBC

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Có cần phải đóng PreparedStatement trước khi chuẩn bị Statement khác không

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  • Summary of article content: Articles about Có cần phải đóng PreparedStatement trước khi chuẩn bị Statement khác không Connection conn = db.getConnection(); PreparedStatement pstmt = conn.prepareStatement(firstsql); ResultSet r = pstmt.executeQuery(); // do something with the … …
  • Most searched keywords: Whether you are looking for Có cần phải đóng PreparedStatement trước khi chuẩn bị Statement khác không Connection conn = db.getConnection(); PreparedStatement pstmt = conn.prepareStatement(firstsql); ResultSet r = pstmt.executeQuery(); // do something with the … Có cần thiết phải đóng ResultSet và PreparedStatement trong một db.getConnection () không? Ví dụ dưới đây: Connection conn = db.getConnection(); PreparedStatement pstmt =…java,database,jdbc,prepared-statement
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Có cần phải đóng PreparedStatement trước khi chuẩn bị Statement khác không
Có cần phải đóng PreparedStatement trước khi chuẩn bị Statement khác không

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Basic data types sample – JDBC Driver for SQL Server | Microsoft Docs

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  • Summary of article content: Articles about Basic data types sample – JDBC Driver for SQL Server | Microsoft Docs setObject(11, new java.util.Date(1453500034839L)); pstmt.setObject(12, 123456789L, microsoft.sql.Types.SQL_VARIANT); pstmt.execute(); } } } … …
  • Most searched keywords: Whether you are looking for Basic data types sample – JDBC Driver for SQL Server | Microsoft Docs setObject(11, new java.util.Date(1453500034839L)); pstmt.setObject(12, 123456789L, microsoft.sql.Types.SQL_VARIANT); pstmt.execute(); } } } … This Microsoft JDBC Driver for SQL Server sample application demonstrates how to use result set methods to retrieve and update values in the database.
  • Table of Contents:

Requirements

Example

See also

Phản hồi

Basic data types sample - JDBC Driver for SQL Server | Microsoft Docs
Basic data types sample – JDBC Driver for SQL Server | Microsoft Docs

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Gda.PStmt –

Classes –

Gda 5.0

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    Gda.PStmt –

    Classes –

    Gda 5.0
    PStmt. sql, str, r, actual SQL code used for this prepared statement, mem freed by Gda.PStmt. tmpl_columns, [ Gda.Column ], r, list of Gda. …

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    Gda.PStmt –

    Classes –

    Gda 5.0
    PStmt. sql, str, r, actual SQL code used for this prepared statement, mem freed by Gda.PStmt. tmpl_columns, [ Gda.Column ], r, list of Gda.

  • Table of Contents:

Methods¶

Virtual Methods¶

Properties¶

Signals¶

Fields¶

Class Details¶


    Gda.PStmt -
    
      Classes -
    
    Gda 5.0
Gda.PStmt –

Classes –

Gda 5.0

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java – Change a line to prepared statement – Stack Overflow

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  • Summary of article content: Articles about java – Change a line to prepared statement – Stack Overflow PreparedStatement pstmt = con.prepareStatement(“INSERT INTO LOGIN VALUES (?,?,?)”); pstmt.setInt (1, Integer.parseInt(jTextField1. …
  • Most searched keywords: Whether you are looking for java – Change a line to prepared statement – Stack Overflow PreparedStatement pstmt = con.prepareStatement(“INSERT INTO LOGIN VALUES (?,?,?)”); pstmt.setInt (1, Integer.parseInt(jTextField1.
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2 Answers
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java - Change a line to prepared statement - Stack Overflow
java – Change a line to prepared statement – Stack Overflow

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MySQL and JSP Web Applications – James Turner – Google Sách

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  • Summary of article content: Articles about MySQL and JSP Web Applications – James Turner – Google Sách Updating …
  • Most searched keywords: Whether you are looking for MySQL and JSP Web Applications – James Turner – Google Sách Updating JSP developers encounter unique problems when building web applications that require intense database connectivity. MySQL and JSP Web Applications addresses the challenges of building data-driven applications based on the JavaServer Pages development model. MySQL and JSP Web Applications begins with an overview of the core technologies required for JSP database development–JavaServer Pages, JDBC, and the database schema. The book then outlines and presents an Internet commerce application that demonstrates concepts such as receiving and processing user input, designing and implementing business rules, and balancing the user load on the server. Through the JDBC (Java DataBase Connector), the developer can communicate with most commercial databases, such as Oracle. The solutions presented in MySQL and JSP Web Applications center on the open source tools MySQL and Tomcat, allowing the reader an affordable way to test applications and experiment with the book’s examples.
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MySQL and JSP Web Applications - James Turner - Google Sách
MySQL and JSP Web Applications – James Turner – Google Sách

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PreparedStatement (Java Platform SE 7 )

Methods

Modifier and Type Method and Description

void addBatch() Adds a set of parameters to this PreparedStatement object’s batch of commands.

void clearParameters() Clears the current parameter values immediately.

boolean execute() Executes the SQL statement in this PreparedStatement object, which may be any kind of SQL statement.

ResultSet executeQuery() Executes the SQL query in this PreparedStatement object and returns the ResultSet object generated by the query.

int executeUpdate() Executes the SQL statement in this PreparedStatement object, which must be an SQL Data Manipulation Language (DML) statement, such as INSERT , UPDATE or DELETE ; or an SQL statement that returns nothing, such as a DDL statement.

ResultSetMetaData getMetaData() Retrieves a ResultSetMetaData object that contains information about the columns of the ResultSet object that will be returned when this PreparedStatement object is executed.

ParameterMetaData getParameterMetaData() Retrieves the number, types and properties of this PreparedStatement object’s parameters.

void setArray(int parameterIndex, Array x) Sets the designated parameter to the given java.sql.Array object.

void setAsciiStream(int parameterIndex, InputStream x) Sets the designated parameter to the given input stream.

void setAsciiStream(int parameterIndex, InputStream x, int length) Sets the designated parameter to the given input stream, which will have the specified number of bytes.

void setAsciiStream(int parameterIndex, InputStream x, long length) Sets the designated parameter to the given input stream, which will have the specified number of bytes.

void setBigDecimal(int parameterIndex, BigDecimal x) Sets the designated parameter to the given java.math.BigDecimal value.

void setBinaryStream(int parameterIndex, InputStream x) Sets the designated parameter to the given input stream.

void setBinaryStream(int parameterIndex, InputStream x, int length) Sets the designated parameter to the given input stream, which will have the specified number of bytes.

void setBinaryStream(int parameterIndex, InputStream x, long length) Sets the designated parameter to the given input stream, which will have the specified number of bytes.

void setBlob(int parameterIndex, Blob x) Sets the designated parameter to the given java.sql.Blob object.

void setBlob(int parameterIndex, InputStream inputStream) Sets the designated parameter to a InputStream object.

void setBlob(int parameterIndex, InputStream inputStream, long length) Sets the designated parameter to a InputStream object.

void setBoolean(int parameterIndex, boolean x) Sets the designated parameter to the given Java boolean value.

void setByte(int parameterIndex, byte x) Sets the designated parameter to the given Java byte value.

void setBytes(int parameterIndex, byte[] x) Sets the designated parameter to the given Java array of bytes.

void setCharacterStream(int parameterIndex, Reader reader) Sets the designated parameter to the given Reader object.

void setCharacterStream(int parameterIndex, Reader reader, int length) Sets the designated parameter to the given Reader object, which is the given number of characters long.

void setCharacterStream(int parameterIndex, Reader reader, long length) Sets the designated parameter to the given Reader object, which is the given number of characters long.

void setClob(int parameterIndex, Clob x) Sets the designated parameter to the given java.sql.Clob object.

void setClob(int parameterIndex, Reader reader) Sets the designated parameter to a Reader object.

void setClob(int parameterIndex, Reader reader, long length) Sets the designated parameter to a Reader object.

void setDate(int parameterIndex, Date x) Sets the designated parameter to the given java.sql.Date value using the default time zone of the virtual machine that is running the application.

void setDate(int parameterIndex, Date x, Calendar cal) Sets the designated parameter to the given java.sql.Date value, using the given Calendar object.

void setDouble(int parameterIndex, double x) Sets the designated parameter to the given Java double value.

void setFloat(int parameterIndex, float x) Sets the designated parameter to the given Java float value.

void setInt(int parameterIndex, int x) Sets the designated parameter to the given Java int value.

void setLong(int parameterIndex, long x) Sets the designated parameter to the given Java long value.

void setNCharacterStream(int parameterIndex, Reader value) Sets the designated parameter to a Reader object.

void setNCharacterStream(int parameterIndex, Reader value, long length) Sets the designated parameter to a Reader object.

void setNClob(int parameterIndex, NClob value) Sets the designated parameter to a java.sql.NClob object.

void setNClob(int parameterIndex, Reader reader) Sets the designated parameter to a Reader object.

void setNClob(int parameterIndex, Reader reader, long length) Sets the designated parameter to a Reader object.

void setNString(int parameterIndex, String value) Sets the designated paramter to the given String object.

void setNull(int parameterIndex, int sqlType) Sets the designated parameter to SQL NULL .

void setNull(int parameterIndex, int sqlType, String typeName) Sets the designated parameter to SQL NULL .

void setObject(int parameterIndex, Object x) Sets the value of the designated parameter using the given object.

void setObject(int parameterIndex, Object x, int targetSqlType) Sets the value of the designated parameter with the given object.

void setObject(int parameterIndex, Object x, int targetSqlType, int scaleOrLength) Sets the value of the designated parameter with the given object.

void setRef(int parameterIndex, Ref x) Sets the designated parameter to the given REF() value.

void setRowId(int parameterIndex, RowId x) Sets the designated parameter to the given java.sql.RowId object.

void setShort(int parameterIndex, short x) Sets the designated parameter to the given Java short value.

void setSQLXML(int parameterIndex, SQLXML xmlObject) Sets the designated parameter to the given java.sql.SQLXML object.

void setString(int parameterIndex, String x) Sets the designated parameter to the given Java String value.

void setTime(int parameterIndex, Time x) Sets the designated parameter to the given java.sql.Time value.

void setTime(int parameterIndex, Time x, Calendar cal) Sets the designated parameter to the given java.sql.Time value, using the given Calendar object.

void setTimestamp(int parameterIndex, Timestamp x) Sets the designated parameter to the given java.sql.Timestamp value.

void setTimestamp(int parameterIndex, Timestamp x, Calendar cal) Sets the designated parameter to the given java.sql.Timestamp value, using the given Calendar object.

void setUnicodeStream(int parameterIndex, InputStream x, int length) Deprecated.

Hướng dẫn Java JDBC, Ví dụ với PreparedStatement trong JDBC

Hướng dẫn Java JDBC, Ví dụ với PreparedStatement trong JDBC.

PreparedStatement

PreparedStatement là một trong ba loại interace thực thi câu lệnh truy vấn SQL trong JDBC API

PreparedStatement có hiệu năng lớn hơn Statement nhưng thấp hơn CallableStatement.

PreparedStatement được sử dụng để thực thi các câu truy vấn SQL động hoặc có tham số.

PreparedStatement thừa kế từ Statement nhưng nó cho phép truyền các tham số vào câu SQL trong thời gian run time.

PreparedStatement được khuyên sử dụng trong trường hợp câu SQL được sử dụng nhiều lần.

Ví dụ với PreparedStatement trong JDBC.

Tạo cơ sở dữ liệu demo-jdbc như hình dưới:

CREATE SCHEMA `demo-jdbc` ;

(Xem lại: Cài đặt và cấu hình MySQL)

Bây giờ mình sẽ viết 1 chương trình Java kết nối tới database demo-jdbc

Tạo 1 table ‘user_info’ với 3 column (id, name, address) trong đó id kiểu int là primary key và tự tăng; name và address kiểu varchar

Thêm, sửa, xóa, truy vấn với table ‘user_info’ đã tạo ở trên.

Để kết nối với MySQL bằng Java chúng ta cần download jdbc tương ứng cho MySQL

Các bạn có thể download thư viện jdbc cho MySQL tại đây mysql-connector-java-6.0.6.jar

Hoặc sử dụng maven:

mysql mysql-connector-java 6.0.6

Ở đây mình dùng maven (nếu bạn nào chưa biết maven thì nên tìm hiểu luôn vì nó được dùng nhiều và khá quan trọng khi đi làm)

Tạo table user_info

package stackjava.com.demojdbc.preparedstatement; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.SQLException; public class CreateTable { public static void main(String[] args) throws SQLException, ClassNotFoundException { Class.forName(“com.mysql.cj.jdbc.Driver”); Connection con = DriverManager.getConnection(“jdbc:mysql://localhost:3306/demo-jdbc”, “root”, “admin1234”); String sql = “CREATE TABLE user_info (” + ” id int(11) NOT NULL AUTO_INCREMENT,” + ” name varchar(45) DEFAULT NULL,” + ” address varchar(255) DEFAULT NULL,” + ” PRIMARY KEY (id)” + “)”; PreparedStatement pstmt = con.prepareStatement(sql); pstmt.execute(); con.close(); System.out.println(“Created!”); } }

Thêm 2 bản ghi vào table user_inf (id tự tăng nên chúng ta không cần thêm nó vào câu lệnh INSERT)

Bạn có thể lấy, với PreparedStatement ta chỉ cần viết 1 câu SQL và truyền tham số cho nó 2 lần để tạo 2 bản ghi chứ không cần viết 2 câu SQL giống như Statement

package stackjava.com.demojdbc.preparedstatement; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; import stackjava.com.demojdbc.entities.User; public class InsertRow { public static void main(String[] args) throws SQLException, ClassNotFoundException { Class.forName(“com.mysql.jdbc.Driver”); Connection con = DriverManager.getConnection(“jdbc:mysql://localhost:3306/demo-jdbc”, “root”, “admin1234”); String sql = “INSERT INTO user_info (name, address) VALUES (?, ?);”; List listUser = new ArrayList(); listUser.add(new User(“Harry”, “England”)); listUser.add(new User(“Batman”, “USA”)); PreparedStatement pstmt = con.prepareStatement(sql); for (User user : listUser) { pstmt.setString(1, user.getName()); pstmt.setString(2, user.getAddress()); pstmt.execute(); } con.close(); System.out.println(“Inserted!”); } }

Update bản ghi (row) có address = “England” thành “VietNam”

package stackjava.com.demojdbc.preparedstatement; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.SQLException; public class UpdateRow { public static void main(String[] args) throws SQLException, ClassNotFoundException { Class.forName(“com.mysql.cj.jdbc.Driver”); Connection con = DriverManager.getConnection(“jdbc:mysql://localhost:3306/demo-jdbc”, “root”, “admin1234”); String sql = “UPDATE user_info SET address = ‘VietNam’ WHERE address = ‘England’;”; PreparedStatement pstmt = con.prepareStatement(sql); pstmt.executeUpdate(); con.close(); System.out.println(“Updated!”); } }

Xóa bản ghi có address = “USA”

package stackjava.com.demojdbc.preparedstatement; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.SQLException; public class DeleteRow { public static void main(String[] args) throws SQLException, ClassNotFoundException { Class.forName(“com.mysql.cj.jdbc.Driver”); Connection con = DriverManager.getConnection(“jdbc:mysql://localhost:3306/demo-jdbc”, “root”, “admin1234”); String sql = “DELETE FROM user_info WHERE address = ‘USA’;”; PreparedStatement pstmt = con.prepareStatement(sql); pstmt.executeUpdate(); con.close(); System.out.println(“DELETED!”); } }

Câu lệnh select tất cả các bản ghi trong table user_info:

package stackjava.com.demojdbc.preparedstatement; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class SelectRow { public static void main(String[] args) throws SQLException, ClassNotFoundException { Class.forName(“com.mysql.cj.jdbc.Driver”); Connection con = DriverManager.getConnection(“jdbc:mysql://localhost:3306/demo-jdbc”, “root”, “admin1234”); String sql = “SELECT * FROM user_info;”; PreparedStatement pstmt = con.prepareStatement(sql); ResultSet rs = pstmt.executeQuery(); while (rs.next()) System.out.println(rs.getInt(1) + ” ” + rs.getString(2) + ” ” + rs.getString(3)); con.close(); System.out.println(“Done!”); } }

Kết quả:

Hướng dẫn Java JDBC, Ví dụ với PreparedStatement trong JDBC

Tương tự với Statement, cách dùng các method execute của PreparedStatement như sau:

execute :dùng cho câu sql DDL (tạo, xóa, sửa bảng)

:dùng cho câu sql DDL (tạo, xóa, sửa bảng) executeUpdate : dùng cho câu sql INSERT, UPDATE, DELETE

: dùng cho câu sql INSERT, UPDATE, DELETE executeQuery: dùng câu sql SELECT

Okay, Done!

Xem thêm:

Truy vấn database với jdbc – StatementStatement

Truy vấn database với jdbc – CallableStatement

Download code ví dụ trên tại đây

Có cần phải đóng PreparedStatement trước khi chuẩn bị Statement khác không

Nói một cách chính xác, nó không cần thiết vì bạn có thể mở nhiều câu lệnh đã chuẩn bị sẵn cùng một lúc. Điều cần thiết là đóng mọi tài nguyên đã mở nếu nó không được sử dụng sau này.

Nhìn vào mã của bạn, nó không đảm bảo rằng trên thực tế, câu lệnh đã đóng.

Để đảm bảo điều này, mọi hoạt động đóng phải được thực hiện bên trong một finally khối: theo cách này, nó sẽ được thực thi cho dù hoạt động có thành công hay không.

Mã mẫu:

PreparedStatement pstmt = null; ResultSet r = null; try { pstmt = conn.prepareStatement(firstsql); r = pstmt.executeQuery(); // do something with the ResultSet } finally { if (r != null) { try { r.close(); } catch (SQLException e) { //log error } } if (pstmt != null) { try { pstmt.close(); } catch (SQLException e) { //log error } } } //and do it again

Mã này có thể được đơn giản hóa rất nhiều nếu bạn đang sử dụng Java 7 với câu lệnh try-with-resources :

So you have finished reading the pstmt topic article, if you find this article useful, please share it. Thank you very much. See more: PreparedStatement, PreparedStatement executeQuery, executeUpdate, PreparedStatement Java, Preparedstatement là gì, PreparedStatement in JDBC, executeUpdate return value, ResultSet

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