我有一个 SQL 语句，它使用通过另一组语句构建的几个表，这些语句又由更多语句集等构建，大约 8 度扇形到大约 25 个表（它在 4 度变得更宽，但是那个级别最终开始指向相同的几个常见来源）。
我正在为 Graphviz 制作一个点文件，该文件显示每个语句的选定列，以及每个来自哪个表。由于涉及案例陈述和功能，有时每列有多个来源。一旦达到了几个级别，它不仅有点混乱，而且很难正确读取或写入。
我一直在尝试寻找是否有一种工具可以分析 SQL 选择语句和（而不是制作执行计划图）图表，哪些输入去哪些输出。最好该工具能够将其与多层语句相结合。
有谁知道这样的工具？
您会看到，在 Google 上搜索“graph an sql statement”之类的东西，最终会得到很多关于如何使用 SQL 查询中的数据或特定于图形数据库的数据制作图表和图形的结果。既不存在也不存在，将“图形”更改为“可视化”也无济于事。
例如
SELECT CASE WHEN A.info IS NULL THEN 'Jam'
WHEN B.inform LIKE 'N/A%' THEN 'Butter'
WHEN A.info > 4 THEN 'Apricot'
ELSE 'Organic'
END AS information,
-- More of the same
FROM 2_KU_4_SKU AS A
LEFT JOIN
SKU_HOWS_ROC AS B
ON A.fskuid = B.idfsk;
INSERT INTO 2_KU_4_SKU
-- More case statements and other stuff but lets just say
sku_id AS fskuid,
short_sku_desc AS info
FROM BASIC_SKU_TABLE_NOT_A_VIEW_TEDS_VERSION_LATEST_Q108;
INSERT INTO SKU_HOWS_ROC
-- You guessed it
sku_id AS idfsk, -- Because words
sku_blurb AS inform
FROM BASIC_SKU_TABLE_STILL_NOT_A_VIEW_BILLS_EXCELLENT_VERSION;
可能希望引导一个工具来制定类似的东西：
通过基本解析上述 SQL 并（一个选项）为 Graphviz 生成一个 DOT 文件，如下所示：
Digraph G {
fontname = "sans-serif";
node [fontname="sans-serif",shape="record"];
subgraph cluster0 {
label="SELECT";
information;
}
subgraph cluster1 {
label="SKU_HOWS_ROC";
a_idfsk [label="idfsk"];
a_info [label="info"];
}
a_info -> information;
subgraph cluster2 {
label="2_KU_4_SKU";
b_fskuid [label="fskuid"];
b_inform [label="inform"];
}
b_inform -> information;
b_fskuid -> a_idfsk -> b_fskuid;
subgraph cluster3 {
label="BASIC_SKU_TABLE_NOT_A_VIEW_TEDS_VERSION_LATEST_Q108";
c_sku_id [label="sku_id"];
c_short_sku_desc [label="short_sku_desc"];
}
c_short_sku_desc -> a_info;
c_sku_id -> a_idfsk;
subgraph cluster4 {
label="BASIC_SKU_TABLE_STILL_NOT_A_VIEW_BILLS_EXCELLENT_VERSION";
d_sku_id [label="sku_id"];
d_sku_blurb [label="sku_blurb"];
}
d_sku_id -> b_fskuid;
d_sku_blurb -> b_inform;
}
如果它可以使用花哨的记录类型节点标签来绘制表格会更好。
而且，由于 Graphviz 可以生成 SVG，但 StackOverflow 似乎无法以我能看到的任何方式嵌入它，运行这个 SVG 片段来查看它的样子（如果上面嵌入的 imgur 不起作用）。
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<!-- Generated by graphviz version 2.39.20160727.0821 (20160727.0821)
-->
<!-- Title: G Pages: 1 -->
<svg viewBox="0.00 0.00 988.00 265.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 261)">
<title>G</title>
<polygon fill="white" stroke="transparent" points="-4,4 -4,-261 984,-261 984,4 -4,4" />
<g id="clust2" class="cluster">
<title>cluster1</title>
<polygon fill="none" stroke="black" points="329,-91 329,-166 471,-166 471,-91 329,-91" />
<text text-anchor="middle" x="400" y="-150.8" font-family="sans-serif" font-size="14.00">SKU_HOWS_ROC</text>
</g>
<g id="clust1" class="cluster">
<title>cluster0</title>
<polygon fill="none" stroke="black" points="388,-8 388,-83 490,-83 490,-8 388,-8" />
<text text-anchor="middle" x="439" y="-67.8" font-family="sans-serif" font-size="14.00">SELECT</text>
</g>
<g id="clust3" class="cluster">
<title>cluster2</title>
<polygon fill="none" stroke="black" points="485,-91 485,-166 627,-166 627,-91 485,-91" />
<text text-anchor="middle" x="556" y="-150.8" font-family="sans-serif" font-size="14.00">2_KU_4_SKU</text>
</g>
<g id="clust5" class="cluster">
<title>cluster4</title>
<polygon fill="none" stroke="black" points="477,-174 477,-249 972,-249 972,-174 477,-174" />
<text text-anchor="middle" x="724.5" y="-233.8" font-family="sans-serif" font-size="14.00">BASIC_SKU_TABLE_STILL_NOT_A_VIEW_BILLS_EXCELLENT_VERSION</text>
</g>
<g id="clust4" class="cluster">
<title>cluster3</title>
<polygon fill="none" stroke="black" points="8,-174 8,-249 469,-249 469,-174 8,-174" />
<text text-anchor="middle" x="238.5" y="-233.8" font-family="sans-serif" font-size="14.00">BASIC_SKU_TABLE_NOT_A_VIEW_TEDS_VERSION_LATEST_Q108</text>
</g>
<!-- information -->
<g id="node1" class="node">
<title>information</title>
<polygon fill="none" stroke="black" points="396.373,-16.5 396.373,-52.5 481.627,-52.5 481.627,-16.5 396.373,-16.5" />
<text text-anchor="middle" x="439" y="-30.3" font-family="sans-serif" font-size="14.00">information</text>
</g>
<!-- a_idfsk -->
<g id="node2" class="node">
<title>a_idfsk</title>
<polygon fill="none" stroke="black" points="409,-99.5 409,-135.5 463,-135.5 463,-99.5 409,-99.5" />
<text text-anchor="middle" x="435.893" y="-113.3" font-family="sans-serif" font-size="14.00">idfsk</text>
</g>
<!-- b_fskuid -->
<g id="node4" class="node">
<title>b_fskuid</title>
<polygon fill="none" stroke="black" points="565,-99.5 565,-135.5 619,-135.5 619,-99.5 565,-99.5" />
<text text-anchor="middle" x="591.786" y="-113.3" font-family="sans-serif" font-size="14.00">fskuid</text>
</g>
<!-- a_idfsk->b_fskuid -->
<g id="edge4" class="edge">
<title>a_idfsk->b_fskuid</title>
<path fill="none" stroke="black" d="M446.616,-135.503C455.979,-149.063 471.07,-165.983 490,-170 504.373,-173.05 544.531,-175.185 556,-166 563.413,-160.064 570.086,-152.258 575.615,-144.648" />
<polygon fill="black" stroke="black" points="578.818,-146.164 581.557,-135.929 573.033,-142.222 578.818,-146.164" />
</g>
<!-- a_info -->
<g id="node3" class="node">
<title>a_info</title>
<polygon fill="none" stroke="black" points="337,-99.5 337,-135.5 391,-135.5 391,-99.5 337,-99.5" />
<text text-anchor="middle" x="363.786" y="-113.3" font-family="sans-serif" font-size="14.00">info</text>
</g>
<!-- a_info->information -->
<g id="edge1" class="edge">
<title>a_info->information</title>
<path fill="none" stroke="black" d="M380.274,-99.4902C390.62,-88.0401 404.181,-73.0328 415.665,-60.3245" />
<polygon fill="black" stroke="black" points="418.391,-62.5274 422.499,-52.7612 413.198,-57.8343 418.391,-62.5274" />
</g>
<!-- b_fskuid->a_idfsk -->
<g id="edge3" class="edge">
<title>b_fskuid->a_idfsk</title>
<path fill="none" stroke="black" d="M581.557,-135.929C575.195,-145.863 566.313,-157.741 556,-166 544.531,-175.185 504.373,-173.05 490,-170 474.767,-166.767 462.021,-155.18 452.744,-143.712" />
<polygon fill="black" stroke="black" points="455.403,-141.423 446.616,-135.503 449.793,-145.61 455.403,-141.423" />
</g>
<!-- b_inform -->
<g id="node5" class="node">
<title>b_inform</title>
<polygon fill="none" stroke="black" points="492.552,-99.5 492.552,-135.5 547.448,-135.5 547.448,-99.5 492.552,-99.5" />
<text text-anchor="middle" x="520" y="-113.3" font-family="sans-serif" font-size="14.00">inform</text>
</g>
<!-- b_inform->information -->
<g id="edge2" class="edge">
<title>b_inform->information</title>
<path fill="none" stroke="black" d="M502.424,-99.4902C491.145,-87.9321 476.328,-72.7493 463.852,-59.9655" />
<polygon fill="black" stroke="black" points="466.31,-57.4735 456.821,-52.7612 461.301,-62.3626 466.31,-57.4735" />
</g>
<!-- c_sku_id -->
<g id="node6" class="node">
<title>c_sku_id</title>
<polygon fill="none" stroke="black" points="404.766,-182.5 404.766,-218.5 461.234,-218.5 461.234,-182.5 404.766,-182.5" />
<text text-anchor="middle" x="433" y="-196.3" font-family="sans-serif" font-size="14.00">sku_id</text>
</g>
<!-- c_sku_id->a_idfsk -->
<g id="edge6" class="edge">
<title>c_sku_id->a_idfsk</title>
<path fill="none" stroke="black" d="M433.651,-182.49C434.037,-171.796 434.536,-157.999 434.975,-145.871" />
<polygon fill="black" stroke="black" points="438.476,-145.881 435.34,-135.761 431.481,-145.628 438.476,-145.881" />
</g>
<!-- c_short_sku_desc -->
<g id="node7" class="node">
<title>c_short_sku_desc</title>
<polygon fill="none" stroke="black" points="272.973,-182.5 272.973,-218.5 387.027,-218.5 387.027,-182.5 272.973,-182.5" />
<text text-anchor="middle" x="330" y="-196.3" font-family="sans-serif" font-size="14.00">short_sku_desc</text>
</g>
<!-- c_short_sku_desc->a_info -->
<g id="edge5" class="edge">
<title>c_short_sku_desc->a_info</title>
<path fill="none" stroke="black" d="M337.377,-182.49C341.847,-171.58 347.639,-157.441 352.679,-145.138" />
<polygon fill="black" stroke="black" points="355.968,-146.342 356.519,-135.761 349.49,-143.688 355.968,-146.342" />
</g>
<!-- d_sku_id -->
<g id="node8" class="node">
<title>d_sku_id</title>
<polygon fill="none" stroke="black" points="579.766,-182.5 579.766,-218.5 636.234,-218.5 636.234,-182.5 579.766,-182.5" />
<text text-anchor="middle" x="608" y="-196.3" font-family="sans-serif" font-size="14.00">sku_id</text>
</g>
<!-- d_sku_id->b_fskuid -->
<g id="edge7" class="edge">
<title>d_sku_id->b_fskuid</title>
<path fill="none" stroke="black" d="M604.528,-182.49C602.467,-171.796 599.807,-157.999 597.469,-145.871" />
<polygon fill="black" stroke="black" points="600.85,-144.918 595.52,-135.761 593.976,-146.243 600.85,-144.918" />
</g>
<!-- d_sku_blurb -->
<g id="node9" class="node">
<title>d_sku_blurb</title>
<polygon fill="none" stroke="black" points="484.648,-182.5 484.648,-218.5 561.352,-218.5 561.352,-182.5 484.648,-182.5" />
<text text-anchor="middle" x="523" y="-196.3" font-family="sans-serif" font-size="14.00">sku_blurb</text>
</g>
<!-- d_sku_blurb->b_inform -->
<g id="edge8" class="edge">
<title>d_sku_blurb->b_inform</title>
<path fill="none" stroke="black" d="M522.349,-182.49C521.963,-171.796 521.464,-157.999 521.025,-145.871" />
<polygon fill="black" stroke="black" points="524.519,-145.628 520.66,-135.761 517.524,-145.881 524.519,-145.628" />
</g>
</g>
</svg>