DBExec

Fungsi antara muka pangkalan data.

Objek yang mengandungi hasil pelaksanaansqlpernyataan, contohnya:

{"columns":["TS","HIGH","OPEN","LOW","CLOSE","VOLUME"],"values":[[1518970320000,100,99.1,90,100,12345.6]]}

objek

DBExec ((sql)

sqlString arahan. sql betul senar

function main() {
    var strSql = [
        ":CREATE TABLE TEST_TABLE(", 
        "TS INT PRIMARY KEY NOT NULL,",
        "HIGH REAL NOT NULL,", 
        "OPEN REAL NOT NULL,", 
        "LOW REAL NOT NULL,", 
        "CLOSE REAL NOT NULL,", 
        "VOLUME REAL NOT NULL)"
    ].join("")
    var ret = DBExec(strSql)
    Log(ret)
    
    // Add a piece of data
    Log(DBExec(":INSERT INTO TEST_TABLE (TS, HIGH, OPEN, LOW, CLOSE, VOLUME) VALUES (1518970320000, 100, 99.1, 90, 100, 12345.6);"))
    
    // Query data
    Log(DBExec(":SELECT * FROM TEST_TABLE;"))
}

def main():
    arr = [
        ":CREATE TABLE TEST_TABLE(", 
        "TS INT PRIMARY KEY NOT NULL,",
        "HIGH REAL NOT NULL,", 
        "OPEN REAL NOT NULL,", 
        "LOW REAL NOT NULL,", 
        "CLOSE REAL NOT NULL,", 
        "VOLUME REAL NOT NULL)"
    ]
    strSql = ""
    for i in range(len(arr)):
        strSql += arr[i]
    ret = DBExec(strSql)
    Log(ret)
    
    # Add a piece of data
    Log(DBExec(":INSERT INTO TEST_TABLE (TS, HIGH, OPEN, LOW, CLOSE, VOLUME) VALUES (1518970320000, 100, 99.1, 90, 100, 12345.6);"))
    
    # Query data
    Log(DBExec(":SELECT * FROM TEST_TABLE;"))

void main() {
    string strSql = ":CREATE TABLE TEST_TABLE(\
        TS INT PRIMARY KEY NOT NULL,\
        HIGH REAL NOT NULL,\
        OPEN REAL NOT NULL,\
        LOW REAL NOT NULL,\
        CLOSE REAL NOT NULL,\
        VOLUME REAL NOT NULL)";
    auto ret = DBExec(strSql);
    Log(ret);
    
    // Add a piece of data
    Log(DBExec(":INSERT INTO TEST_TABLE (TS, HIGH, OPEN, LOW, CLOSE, VOLUME) VALUES (1518970320000, 100, 99.1, 90, 100, 12345.6);"));
    
    // Query data
    Log(DBExec(":SELECT * FROM TEST_TABLE;"));
}

Sokongan pangkalan data dalam memori, untukDBExecparameter fungsi, jikasqlpernyataan bermula dengan:Ia sesuai untuk operasi pangkalan data yang tidak memerlukan simpanan berterusan, contohnya:

function main() {
    var strSql = [
        "CREATE TABLE TEST_TABLE(", 
        "TS INT PRIMARY KEY NOT NULL,",
        "HIGH REAL NOT NULL,", 
        "OPEN REAL NOT NULL,", 
        "LOW REAL NOT NULL,", 
        "CLOSE REAL NOT NULL,", 
        "VOLUME REAL NOT NULL)"
    ].join("")
    var ret = DBExec(strSql)
    Log(ret)
}

def main():
    arr = [
        "CREATE TABLE TEST_TABLE(", 
        "TS INT PRIMARY KEY NOT NULL,",
        "HIGH REAL NOT NULL,", 
        "OPEN REAL NOT NULL,", 
        "LOW REAL NOT NULL,", 
        "CLOSE REAL NOT NULL,", 
        "VOLUME REAL NOT NULL)"
    ]
    strSql = ""
    for i in range(len(arr)):
        strSql += arr[i]
    ret = DBExec(strSql)
    Log(ret)

void main() {
    string strSql = "CREATE TABLE TEST_TABLE(\
        TS INT PRIMARY KEY NOT NULL,\
        HIGH REAL NOT NULL,\
        OPEN REAL NOT NULL,\
        LOW REAL NOT NULL,\
        CLOSE REAL NOT NULL,\
        VOLUME REAL NOT NULL)";
    auto ret = DBExec(strSql);
    Log(ret);
}

Buat meja.

function main() {
    var strSql = [
        "CREATE TABLE TEST_TABLE(", 
        "TS INT PRIMARY KEY NOT NULL,",
        "HIGH REAL NOT NULL,", 
        "OPEN REAL NOT NULL,", 
        "LOW REAL NOT NULL,", 
        "CLOSE REAL NOT NULL,", 
        "VOLUME REAL NOT NULL)"
    ].join("")
    Log(DBExec(strSql))
    
    // Add a piece of data
    Log(DBExec("INSERT INTO TEST_TABLE (TS, HIGH, OPEN, LOW, CLOSE, VOLUME) VALUES (1518970320000, 100, 99.1, 90, 100, 12345.6);"))
    
    // Query data
    Log(DBExec("SELECT * FROM TEST_TABLE;"))
    
    // Modify data
    Log(DBExec("UPDATE TEST_TABLE SET HIGH=? WHERE TS=?", 110, 1518970320000))    
    
    // Delete data
    Log(DBExec("DELETE FROM TEST_TABLE WHERE HIGH=?", 110))
}

def main():
    arr = [
        "CREATE TABLE TEST_TABLE(", 
        "TS INT PRIMARY KEY NOT NULL,",
        "HIGH REAL NOT NULL,", 
        "OPEN REAL NOT NULL,", 
        "LOW REAL NOT NULL,", 
        "CLOSE REAL NOT NULL,", 
        "VOLUME REAL NOT NULL)"
    ]
    strSql = ""
    for i in range(len(arr)):
        strSql += arr[i]
    Log(DBExec(strSql))
    
    # Add a piece of data
    Log(DBExec("INSERT INTO TEST_TABLE (TS, HIGH, OPEN, LOW, CLOSE, VOLUME) VALUES (1518970320000, 100, 99.1, 90, 100, 12345.6);"))
    
    # Query data
    Log(DBExec("SELECT * FROM TEST_TABLE;"))
    
    # Modify data
    Log(DBExec("UPDATE TEST_TABLE SET HIGH=? WHERE TS=?", 110, 1518970320000))
    
    # Delete data
    Log(DBExec("DELETE FROM TEST_TABLE WHERE HIGH=?", 110))

void main() {
    string strSql = "CREATE TABLE TEST_TABLE(\
        TS INT PRIMARY KEY NOT NULL,\
        HIGH REAL NOT NULL,\
        OPEN REAL NOT NULL,\
        LOW REAL NOT NULL,\
        CLOSE REAL NOT NULL,\
        VOLUME REAL NOT NULL)";
    Log(DBExec(strSql));            

    // Add a piece of data
    Log(DBExec("INSERT INTO TEST_TABLE (TS, HIGH, OPEN, LOW, CLOSE, VOLUME) VALUES (1518970320000, 100, 99.1, 90, 100, 12345.6);"));
    
    // Query data
    Log(DBExec("SELECT * FROM TEST_TABLE;"));
    
    // Modify data
    Log(DBExec("UPDATE TEST_TABLE SET HIGH=? WHERE TS=?", 110, 1518970320000));
    
    // Delete data
    Log(DBExec("DELETE FROM TEST_TABLE WHERE HIGH=?", 110));
}

Tambah, hapuskan, periksa dan ubah rekod dalam jadual.

FungsiDBExec()dapat mengendalikan pangkalan data perdagangan langsung (pangkalan data SQLite) dengan menyampaikan parameter.SQLiteSistem disediakan jadual dalam pangkalan data perdagangan langsung:kvdb, cfg, log, profit, chart, jangan beroperasi di atas meja ini.Transaksitidak disokong dan tidak disyorkan untuk melakukan operasi tersebut, yang boleh menyebabkan konflik dalam sistem.DBExec()Fungsi hanya disokong untuk perdagangan langsung.

{@fun/Global/_G _G}

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