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index c3a02fe8..d2bf45af 100644
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diff --git a/03-filter.html b/03-filter.html
index e590c368..cd3bd447 100644
--- a/03-filter.html
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diff --git a/04-calc.html b/04-calc.html
index 18b6a86b..29bb5847 100644
--- a/04-calc.html
+++ b/04-calc.html
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-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
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@@ -560,7 +560,7 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
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-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
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-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
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 <div class="codewrapper sourceCode" id="cb9">
 <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -690,7 +690,7 @@ <h3 class="callout-title">Key Points</h3>
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   "dateCreated": "2014-11-21",
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+  "datePublished": "2024-12-24"
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diff --git a/05-null.html b/05-null.html
index f1a21d90..1fa95a76 100644
--- a/05-null.html
+++ b/05-null.html
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   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
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 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb11">
 <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -697,7 +697,7 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>You might expect the above query to return rows where dated is either
 ‘1927-02-08’ or NULL. Instead it only returns rows where dated is
@@ -812,7 +812,7 @@ <h3 class="callout-title">Key Points</h3>
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   "dateCreated": "2014-11-21",
   "dateModified": "2023-05-08",
-  "datePublished": "2024-12-17"
+  "datePublished": "2024-12-24"
 }
 
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diff --git a/06-agg.html b/06-agg.html
index f972aa84..48051e2d 100644
--- a/06-agg.html
+++ b/06-agg.html
@@ -725,7 +725,7 @@ <h3 class="callout-title">Counting Temperature Readings</h3>
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   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb17">
 <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -759,7 +759,7 @@ <h3 class="callout-title">Averaging with NULL</h3>
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   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>The answer is 3.0. <code>NULL</code> is not a value; it is the
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@@ -800,7 +800,7 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>The query produces only one row of results when we what we really
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@@ -862,7 +862,7 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
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 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>List all the family names separated by a comma:</p>
 <div class="codewrapper sourceCode" id="cb24">
@@ -958,7 +958,7 @@ <h3 class="callout-title">Key Points</h3>
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   "dateCreated": "2014-11-21",
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-  "datePublished": "2024-12-17"
+  "datePublished": "2024-12-24"
 }
 
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diff --git a/07-join.html b/07-join.html
index 51fb2bd4..885df62d 100644
--- a/07-join.html
+++ b/07-join.html
@@ -863,7 +863,7 @@ <h3 class="callout-title">Listing Radiation Readings</h3>
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   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
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 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb6">
 <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -907,7 +907,7 @@ <h3 class="callout-title">Where’s Frank?</h3>
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   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
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 <div class="codewrapper sourceCode" id="cb7">
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@@ -967,7 +967,7 @@ <h3 class="callout-title">Who Has Been Where?</h3>
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 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
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 <div class="codewrapper sourceCode" id="cb9">
 <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -1207,7 +1207,7 @@ <h3 class="callout-title">Key Points</h3>
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   "dateCreated": "2014-11-21",
   "dateModified": "2024-01-18",
-  "datePublished": "2024-12-17"
+  "datePublished": "2024-12-24"
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diff --git a/08-hygiene.html b/08-hygiene.html
index 02f4d5fe..725713f8 100644
--- a/08-hygiene.html
+++ b/08-hygiene.html
@@ -615,7 +615,7 @@ <h3 class="callout-title">Key Points</h3>
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   "dateCreated": "2014-11-21",
   "dateModified": "2023-05-08",
-  "datePublished": "2024-12-17"
+  "datePublished": "2024-12-24"
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diff --git a/09-create.html b/09-create.html
index 5aac3558..e093f8a6 100644
--- a/09-create.html
+++ b/09-create.html
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   "dateCreated": "2014-11-21",
   "dateModified": "2023-05-08",
-  "datePublished": "2024-12-17"
+  "datePublished": "2024-12-24"
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diff --git a/10-prog.html b/10-prog.html
index 62810cd0..72da0d7b 100644
--- a/10-prog.html
+++ b/10-prog.html
@@ -635,7 +635,7 @@ <h3 class="callout-title">Filling a Table vs. Printing Values</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
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 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb13">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -697,7 +697,7 @@ <h3 class="callout-title">Filtering in SQL vs. Filtering in Python</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>The first example reads all the data into memory and filters the
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@@ -866,7 +866,7 @@ <h3 class="callout-title">Key Points</h3>
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   "dateCreated": "2014-11-21",
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index 1da32c57..ac0f86b8 100644
--- a/11-prog-R.html
+++ b/11-prog-R.html
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   "dateCreated": "2014-11-21",
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diff --git a/404.html b/404.html
index cc2b46b1..59a73b27 100644
--- a/404.html
+++ b/404.html
@@ -419,8 +419,8 @@ <h1>Page not found</h1>
   "url": "https://swcarpentry.github.io/sql-novice-survey/404.html",
   "identifier": "https://swcarpentry.github.io/sql-novice-survey/404.html",
   "dateCreated": "2014-11-21",
-  "dateModified": "2024-12-17",
-  "datePublished": "2024-12-17"
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diff --git a/CODE_OF_CONDUCT.html b/CODE_OF_CONDUCT.html
index 0b048c13..55c71e91 100644
--- a/CODE_OF_CONDUCT.html
+++ b/CODE_OF_CONDUCT.html
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   "dateCreated": "2014-11-21",
   "dateModified": "2023-05-08",
-  "datePublished": "2024-12-17"
+  "datePublished": "2024-12-24"
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diff --git a/LICENSE.html b/LICENSE.html
index 8ab56afe..a8d1d204 100644
--- a/LICENSE.html
+++ b/LICENSE.html
@@ -478,7 +478,7 @@ <h1>Licenses</h1>
   "identifier": "https://swcarpentry.github.io/sql-novice-survey/LICENSE.html",
   "dateCreated": "2014-11-21",
   "dateModified": "2023-05-08",
-  "datePublished": "2024-12-17"
+  "datePublished": "2024-12-24"
 }
 
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diff --git a/aio.html b/aio.html
index c5a835c4..c0c88288 100644
--- a/aio.html
+++ b/aio.html
@@ -2758,7 +2758,7 @@ <h3 class="callout-title">Fixing Salinity Readings</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb5">
 <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -2880,7 +2880,7 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
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 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb7">
 <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -2937,7 +2937,7 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
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 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb9">
 <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -3351,7 +3351,7 @@ <h3 class="callout-title">Sorting by Known Date</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb11">
 <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -3428,7 +3428,7 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>You might expect the above query to return rows where dated is either
 ‘1927-02-08’ or NULL. Instead it only returns rows where dated is
@@ -4027,7 +4027,7 @@ <h3 class="callout-title">Counting Temperature Readings</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb17">
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@@ -4067,7 +4067,7 @@ <h3 class="callout-title">Averaging with NULL</h3>
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 <p>You might expect the above query to return rows where dated is either
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 <p>The answer is 3.0. <code>NULL</code> is not a value; it is the
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 <p>The query produces only one row of results when we what we really
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index a3d68e11..325a8238 100644
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index 07d7dd7c..4a2df7df 100644
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