Question

对于下面的查询

SQL：

'self'

蒙戈：

SELECT * FROM TableA as A LEFT JOIN TableB as B ON (A.id = B.id AND A.name =B.name)

对于上面的查询，没有出现所需的输出。

Answer 1

您可以参考this sample playground

static void
svg_dev_text_span(fz_context *ctx, svg_device *sdev, fz_matrix ctm, const fz_text_span *span)
{
    ...
    fz_matrix tm, inv_tm, final_tm;
    ...

    tm = span->trm;
    font_size = fz_matrix_expansion(tm);
    final_tm.a = tm.a / font_size;
    final_tm.b = tm.b / font_size;
    final_tm.c = -tm.c / font_size;
    final_tm.d = -tm.d / font_size;
    final_tm.e = 0;
    final_tm.f = 0;
    inv_tm = fz_invert_matrix(final_tm);
    final_tm = fz_concat(final_tm, ctm);

    tm.e = span->items[0].x;
    tm.f = span->items[0].y;

    ...
    fz_write_printf(ctx, out, " transform=\"matrix(%M)\"", &final_tm);

Reference

MongoDB - 在多个条件下加入

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