Can you help me write a script for table, which can save a lot of work.

Hi @dublove5CFE, here's a script to do what you want I think.

- Mark

/**
 * Adjust selected tables.
 * @author m1b
 * @discussion https://community.adobe.com/t5/indesign-discussions/can-you-help-me-write-a-script-for-table-which-can-save-a-lot-of-work/m-p/13861606
 */
function main() {

    var doc = app.activeDocument,
        tables = getSelectedTables(doc),
        tableStyle = getByName(doc.allTableStyles, 'Tabs'),
        footerStyle = getByName(doc.allCellStyles, 'Footer');

    if (tables.length == 0)
        alert('No tables selected.');

    for (var i = tables.length - 1; i >= 0; i--) {

        var table = tables[i];

        // apply table style
        table.appliedTableStyle = tableStyle;

        // set all rows height
        table.rows.everyItem().autoGrow = true;
        table.rows.everyItem().minimumHeight = '10mm';

        // convert first row to header
        if (table.rows[0].rowType == RowTypes.BODY_ROW)
            table.rows[0].rowType = RowTypes.HEADER_ROW;

        // adjust footer row
        var footerRow = table.rows.lastItem();
        if (footerRow.contents.join('').length > 0)
            footerRow = table.rows.add();
        if (footerRow.rowType !== RowTypes.FOOTER_ROW)
            footerRow.rowType = RowTypes.FOOTER_ROW;
        footerRow.autoGrow = false;
        footerRow.height = '1.058mm';
        footerRow.cells.everyItem().appliedCellStyle = footerStyle;

    }

};

app.doScript(main, ScriptLanguage.JAVASCRIPT, undefined, UndoModes.ENTIRE_SCRIPT, 'Adjust Tables');


/**
 * Returns array of Tables,
 * based on document's selection.
 * @author m1b
 * @version 2023-06-15
 * @param {Document} doc - an Indesign Document.
 * @returns {Array<Table>}
 */
function getSelectedTables(doc) {

    if (
        doc == undefined
        || doc.selection == undefined
    )
        return [];

    var sel = doc.selection,
        tables = [];

    for (var i = 0; i < sel.length; i++) {

        if (sel[i].hasOwnProperty('tables'))
            for (var j = 0; j < sel[i].tables.length; j++)
                tables.push(sel[i].tables[j]);

        if (sel[i].parent.constructor.name == 'Table')
            tables.push(sel[i].parent);

        if (sel[i].parent.parent.constructor.name == 'Table')
            tables.push(sel[i].parent.parent);

        if (sel[i].constructor.name == 'Table')
            tables.push(sel[i]);


    }

    return tables;

};

/**
 * Returns a style matching name.
 * @author m1b
 * @version 2022-08-14
 * @param {Array<style>} styles - an array or collection of styles.
 * @param {String} name - the name to match.
 * @returns {style}
 */
function getByName(styles, name) {

    for (var i = 0; i < styles.length; i++)
        if (styles[i].name == name)
            return styles[i];

};

Edit 2023-06-14: set all rows' heights and footer row's height.

Edit 2023-06-15: now correctly adds footer row.

Edit 2023-06-15: footer row only added if last row isn't empty. Improved getSelectedTables function.

Edit 2023-06-16: now correctly adjusts footer row even if already a footer row.